I've add a few new features and made some changes to sysex format in the latest version. I haven't had time to thoroughly test it but if you're not afraid of burning down your MegaDrum you can test it. The changes are:
1. SysEx config is now sent/received in one page. If you're using MIDI-OX for saving/restoring configs, make sure you set Input and Output Buffer sizes to at least 512 in Options->Configure Buffers. If you're using Bootloader, you've probably already set Output Buffer size to 40000.
2. Added SysEx Chain ID. Allows several MegaDrums connected in a chain to be controlled from a PC. Assign a unique Chain ID to each MegaDrum in a chain.
3. Added Level Compression and Level Shift. Level Compression can be set between 0 (no compression or level = original level * 128/128) and 7 (level = original level * 72/128). Level Shift can be set to 0,8,16,24,32,40,48 or 56. Level Shift is added after the level compression (or no compression for that matter).
All these changes are now in the latest release firmware version.