Hello, I'm in the middle of building my own Midibox DIY synth. Both SID and FM modules works fine, so I deciced to build them together. My current config looks like this: Midi In --> Core1 (for SID) --> MBLink --> Core2 (for FM) --> Midi Out Almost everything works (ordinary midi messaged are processed well), except sysex messages. Core2 can be accessed fine with sysex, I can upload patches, firmware. Core1 does not work, when I try to reload firmware, I get "Received unexpected MIOS SysEx message = 00007E40020E0B00F7 expected = 00007E4001" message. Core1 configured to MBLink forward point, device id 1, and Core2 configured to link endpoint and device id 2. Am I missed something important? Thanks. Regards, Gyurek