diff --git a/README.md b/README.md
index 3e2a4cb..bab04c5 100644
--- a/README.md
+++ b/README.md
@@ -11,4 +11,4 @@ Only requires OpenGL, Ruby, and a few gems.
 `ruby w3d_hub_linux_launcher.rb`
 
 ## Contributing
-Contributors welcome, especially if anyone can lend a hand at reducing patching memory usage.
+Contributors welcome.
diff --git a/lib/application_manager/task.rb b/lib/application_manager/task.rb
index 4f334c4..9727790 100644
--- a/lib/application_manager/task.rb
+++ b/lib/application_manager/task.rb
@@ -739,34 +739,51 @@ class W3DHub
         temp_file_path = normalize_path(manifest_file.name, temp_path)
 
         logger.info(LOG_TAG) { "      Loading #{temp_file_path}.patch..." }
-        patch_mix = W3DHub::Mixer::Reader.new(file_path: "#{temp_file_path}.patch", ignore_crc_mismatches: false)
-        patch_info = JSON.parse(patch_mix.package.files.find { |f| f.name.casecmp?(".w3dhub.patch") || f.name.casecmp?(".bhppatch") }.data, symbolize_names: true)
+        patch_mix = W3DHub::WWMix.new(path: "#{temp_file_path}.patch")
+        unless patch_mix.load
+          raise patch_mix.error_reason
+        end
+        patch_entry = patch_mix.entries.find { |e| e.name.casecmp?(".w3dhub.patch") || e.name.casecmp?(".bhppatch") }
+        patch_entry.read
+
+        patch_info = JSON.parse(patch_entry.blob, symbolize_names: true)
 
         logger.info(LOG_TAG) { "      Loading #{file_path}..." }
-        target_mix = W3DHub::Mixer::Reader.new(file_path: "#{file_path}", ignore_crc_mismatches: false)
+        target_mix = W3DHub::WWMix.new(path: "#{file_path}")
+        unless target_mix.load
+          raise target_mix.error_reason
+        end
 
         logger.info(LOG_TAG) { "      Removing files..." } if patch_info[:removedFiles].size.positive?
         patch_info[:removedFiles].each do |file|
           logger.debug(LOG_TAG) { "        #{file}" }
-          target_mix.package.files.delete_if { |f| f.name.casecmp?(file) }
+          target_mix.entries.delete_if { |e| e.name.casecmp?(file) }
         end
 
         logger.info(LOG_TAG) { "      Adding/Updating files..." } if patch_info[:updatedFiles].size.positive?
         patch_info[:updatedFiles].each do |file|
           logger.debug(LOG_TAG) { "        #{file}" }
 
-          patch = patch_mix.package.files.find { |f| f.name.casecmp?(file) }
-          target = target_mix.package.files.find { |f| f.name.casecmp?(file) }
+          patch = patch_mix.entries.find { |e| e.name.casecmp?(file) }
+          target = target_mix.entries.find { |e| e.name.casecmp?(file) }
 
           if target
-            target_mix.package.files[target_mix.package.files.index(target)] = patch
+            target_mix.entries[target_mix.entries.index(target)] = patch
           else
-            target_mix.package.files << patch
+            target_mix.entries << patch
           end
         end
 
         logger.info(LOG_TAG) { "      Writing updated #{file_path}..." } if patch_info[:updatedFiles].size.positive?
-        W3DHub::Mixer::Writer.new(file_path: "#{file_path}", package: target_mix.package, memory_buffer: true, encrypted: target_mix.encrypted?)
+        temp_mix_path = "#{temp_path}/#{File.basename(file_path)}"
+        temp_mix = W3DHub::WWMix.new(path: temp_mix_path)
+        target_mix.entries.each { |e| temp_mix.add_entry(entry: e) }
+        unless temp_mix.save
+          raise temp_mix.error_reason
+        end
+
+        # Overwrite target mix with temp mix
+        FileUtils.mv(temp_mix_path, file_path)
 
         FileUtils.remove_dir(temp_path)
 
diff --git a/lib/mixer.rb b/lib/mixer.rb
deleted file mode 100644
index 86d4399..0000000
--- a/lib/mixer.rb
+++ /dev/null
@@ -1,386 +0,0 @@
-require "digest"
-require "stringio"
-
-class W3DHub
-
-  # https://github.com/TheUnstoppable/MixLibrary used for reference
-  class Mixer
-    DEFAULT_BUFFER_SIZE = 32_000_000
-    MIX1_HEADER = 0x3158494D
-    MIX2_HEADER = 0x3258494D
-
-    class MixParserException < RuntimeError; end
-    class MixFormatException < RuntimeError; end
-
-    class MemoryBuffer
-      def initialize(file_path:, mode:, buffer_size:, encoding: Encoding::ASCII_8BIT)
-        @mode = mode
-
-        @file = File.open(file_path, mode == :read ? "rb" : "wb")
-        @file.pos = 0
-        @file_size = File.size(file_path)
-
-        @buffer_size = buffer_size
-        @chunk = 0
-        @last_chunk = 0
-        @max_chunks = @file_size / @buffer_size
-        @last_cached_chunk = nil
-
-        @encoding = encoding
-
-        @last_buffer_pos = 0
-        @buffer = @mode == :read ? StringIO.new(@file.read(@buffer_size)) : StringIO.new
-        @buffer.set_encoding(encoding)
-
-        # Cache frequently accessed chunks to reduce disk hits
-        @cache = {}
-      end
-
-      def pos
-        @chunk * @buffer_size + @buffer.pos
-      end
-
-      def pos=(offset)
-        last_chunk = @chunk
-        @chunk = offset / @buffer_size
-
-        raise "No backsies! #{offset} (#{@chunk}/#{last_chunk})" if @mode == :write && @chunk < last_chunk
-
-        fetch_chunk(@chunk) if @mode == :read
-
-        @buffer.pos = offset % @buffer_size
-      end
-
-      # string of bytes
-      def write(bytes)
-        length = bytes.length
-
-        # Crossing buffer boundry
-        if @buffer.pos + length > @buffer_size
-
-          edge_size = @buffer_size - @buffer.pos
-          buffer_edge = bytes[0...edge_size]
-
-          bytes_to_write = bytes.length - buffer_edge.length
-          chunks_to_write = (bytes_to_write / @buffer_size.to_f).ceil
-          bytes_written = buffer_edge.length
-
-          @buffer.write(buffer_edge)
-          flush_chunk
-
-          chunks_to_write.times do |i|
-            i += 1
-
-            @buffer.write(bytes[bytes_written...bytes_written + @buffer_size])
-            bytes_written += @buffer_size
-
-            flush_chunk if string.length == @buffer_size
-          end
-        else
-          @buffer.write(bytes)
-        end
-
-        bytes
-      end
-
-      def write_header(data_offset:, name_offset:)
-        flush_chunk
-
-        @file.pos = 4
-        write_i32(data_offset)
-        write_i32(name_offset)
-
-        @file.pos = 0
-      end
-
-      def write_i32(int)
-        @file.write([int].pack("l"))
-      end
-
-      def read(bytes = nil)
-        raise ArgumentError, "Cannot read whole file" if bytes.nil?
-        raise ArgumentError, "Cannot under read buffer" if bytes.negative?
-
-        # Long read, need to fetch next chunk while reading, mostly defeats this class...?
-        if @buffer.pos + bytes > buffered
-          buff = string[@buffer.pos..buffered]
-
-          bytes_to_read = bytes - buff.length
-          chunks_to_read = (bytes_to_read / @buffer_size.to_f).ceil
-
-          chunks_to_read.times do |i|
-            i += 1
-
-            fetch_chunk(@chunk + 1)
-
-            if i == chunks_to_read # read partial
-              already_read_bytes = (chunks_to_read - 1) * @buffer_size
-              bytes_more_to_read = bytes_to_read - already_read_bytes
-
-              buff << @buffer.read(bytes_more_to_read)
-            else
-              buff << @buffer.read
-            end
-          end
-
-          buff
-        else
-          fetch_chunk(@chunk) if @last_chunk != @chunk
-
-          @buffer.read(bytes)
-        end
-      end
-
-      def readbyte
-        fetch_chunk(@chunk + 1) if @buffer.pos + 1 > buffered
-
-        @buffer.readbyte
-      end
-
-      def fetch_chunk(chunk)
-        raise ArgumentError, "Cannot fetch chunk #{chunk}, only #{@max_chunks} exist!" if chunk > @max_chunks
-        @last_chunk = @chunk
-        @chunk = chunk
-        @last_buffer_pos = @buffer.pos
-
-        cached = @cache[chunk]
-
-        if cached
-          @buffer.string = cached
-        else
-          @file.pos = chunk * @buffer_size
-          buff = @buffer.string = @file.read(@buffer_size)
-
-          # Cache the active chunk (implementation bounces from @file_data_chunk and back to this for each 'file' processed)
-          if @chunk != @file_data_chunk && @chunk != @last_cached_chunk
-            @cache.delete(@last_cached_chunk) unless @last_cached_chunk == @file_data_chunk
-            @cache[@chunk] = buff
-            @last_cached_chunk = @chunk
-          end
-
-          buff
-        end
-      end
-
-      # This is accessed quite often, keep it around
-      def cache_file_data_chunk!
-        @file_data_chunk = @chunk
-
-        last_buffer_pos = @buffer.pos
-        @buffer.pos = 0
-        @cache[@chunk] = @buffer.read
-        @buffer.pos = last_buffer_pos
-      end
-
-      def flush_chunk
-        @last_chunk = @chunk
-        @chunk += 1
-
-        @file.pos = @last_chunk * @buffer_size
-        @file.write(string)
-
-        @buffer.string = "".force_encoding(@encoding)
-      end
-
-      def string
-        @buffer.string
-      end
-
-      def buffered
-        @buffer.string.length
-      end
-
-      def close
-        @file&.close
-      end
-    end
-
-    class Reader
-      attr_reader :package
-
-      def initialize(file_path:, ignore_crc_mismatches: false, metadata_only: false, buffer_size: DEFAULT_BUFFER_SIZE)
-        @package = Package.new
-
-        @buffer = MemoryBuffer.new(file_path: file_path, mode: :read, buffer_size: buffer_size)
-
-        @buffer.pos = 0
-
-        @encrypted = false
-
-        # Valid header
-        if (mime = read_i32) && (mime == MIX1_HEADER || mime == MIX2_HEADER)
-          @encrypted = mime == MIX2_HEADER
-
-          file_data_offset = read_i32
-          file_names_offset = read_i32
-
-          @buffer.pos = file_names_offset
-          file_count = read_i32
-
-          file_count.times do
-            @package.files << Package::File.new(name: read_string)
-          end
-
-          @buffer.pos = file_data_offset
-          @buffer.cache_file_data_chunk!
-
-          _file_count = read_i32
-
-          file_count.times do |i|
-            file = @package.files[i]
-
-            file.mix_crc = read_u32.to_s(16).rjust(8, "0")
-            file.content_offset = read_u32
-            file.content_length = read_u32
-
-            if !ignore_crc_mismatches && file.mix_crc != file.file_crc
-              raise MixParserException, "CRC mismatch for #{file.name}. #{file.mix_crc.inspect} != #{file.file_crc.inspect}"
-            end
-
-            pos = @buffer.pos
-            @buffer.pos = file.content_offset
-            file.data = @buffer.read(file.content_length) unless metadata_only
-            @buffer.pos = pos
-          end
-        else
-          raise MixParserException, "Invalid MIX file: Expected \"#{MIX1_HEADER}\" or \"#{MIX2_HEADER}\", got \"0x#{mime.to_s(16).upcase}\"\n(#{file_path})"
-        end
-
-      ensure
-        @buffer&.close
-        @buffer = nil # let GC collect
-      end
-
-      def read_i32
-        @buffer.read(4).unpack1("l")
-      end
-
-      def read_u32
-        @buffer.read(4).unpack1("L")
-      end
-
-      def read_string
-        buffer = ""
-
-        length = @buffer.readbyte
-
-        length.times do
-          buffer << @buffer.readbyte
-        end
-
-        buffer.strip
-      end
-
-      def encrypted?
-        @encrypted
-      end
-    end
-
-    class Writer
-      attr_reader :package
-
-      def initialize(file_path:, package:, memory_buffer: false, buffer_size: DEFAULT_BUFFER_SIZE, encrypted: false)
-        @package = package
-
-        @buffer = MemoryBuffer.new(file_path: file_path, mode: :write, buffer_size: buffer_size)
-        @buffer.pos = 0
-
-        @encrypted = encrypted
-
-        @buffer.write(encrypted? ? "MIX2" : "MIX1")
-
-        files = @package.files.sort { |a, b| a.file_crc <=> b.file_crc }
-
-        @buffer.pos = 16
-
-        files.each do |file|
-          file.content_offset = @buffer.pos
-          file.content_length = file.data.length
-          @buffer.write(file.data)
-
-          @buffer.pos += -@buffer.pos & 7
-        end
-
-        file_data_offset = @buffer.pos
-        write_i32(files.count)
-
-        files.each do |file|
-          write_u32(file.file_crc.to_i(16))
-          write_u32(file.content_offset)
-          write_u32(file.content_length)
-        end
-
-        file_name_offset = @buffer.pos
-        write_i32(files.count)
-
-        files.each do |file|
-          write_byte(file.name.length + 1)
-          @buffer.write("#{file.name}\0")
-        end
-
-        @buffer.write_header(data_offset: file_data_offset, name_offset: file_name_offset)
-      ensure
-        @buffer&.close
-      end
-
-      def write_i32(int)
-        @buffer.write([int].pack("l"))
-      end
-
-      def write_u32(uint)
-        @buffer.write([uint].pack("L"))
-      end
-
-      def write_byte(byte)
-        @buffer.write([byte].pack("c"))
-      end
-
-      def encrypted?
-        @encrypted
-      end
-    end
-
-    # Eager loads patch file and streams target file metadata (doen't load target file data or generate CRCs)
-    # after target file metadata is loaded, create a temp file and merge patched files into list then
-    # build ordered file list and stream patched files and target file chunks into temp file,
-    # after that is done, replace target file with temp file
-    class Patcher
-      def initialize(patch_files:, target_file:, temp_file:, buffer_size: DEFAULT_BUFFER_SIZE)
-        @patch_files = patch_files.to_a.map { |f| Reader.new(file_path: f) }
-        @target_file = File.open(target_file)
-        @temp_file = File.open(temp_file, "a+b")
-        @buffer_size = buffer_size
-      end
-    end
-
-    class Package
-      attr_reader :files
-
-      def initialize(files: [])
-        @files = files
-      end
-
-      class File
-        attr_accessor :name, :mix_crc, :content_offset, :content_length, :data
-
-        def initialize(name:, mix_crc: nil, content_offset: nil, content_length: nil, data: nil)
-          @name = name
-          @mix_crc = mix_crc
-          @content_offset = content_offset
-          @content_length = content_length
-          @data = data
-        end
-
-        def file_crc
-          return "e6fe46b8" if @name.downcase == ".w3dhub.patch"
-
-          Digest::CRC32.hexdigest(@name.upcase)
-        end
-
-        def data_crc
-          Digest::CRC32.hexdigest(@data)
-        end
-      end
-    end
-  end
-end
\ No newline at end of file
diff --git a/w3d_hub_linux_launcher.rb b/w3d_hub_linux_launcher.rb
index ac73b04..0dfbc88 100644
--- a/w3d_hub_linux_launcher.rb
+++ b/w3d_hub_linux_launcher.rb
@@ -105,7 +105,7 @@ require_relative "lib/store"
 require_relative "lib/window"
 require_relative "lib/cache"
 require_relative "lib/settings"
-require_relative "lib/mixer"
+require_relative "lib/ww_mix"
 require_relative "lib/ico"
 require_relative "lib/broadcast_server"
 require_relative "lib/hardware_survey"