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Please keep us updated.
Can you make your sourcecode available. I realise the mega-specific parts of it are probably very few and easily figured out, but it would be nice to have a standard configuration available.
How are you handling the display? What #include are you using for it?
Photos? Can you try to illustrate the wires that run directly to the secondary board? It might help get others interested in deciphering the arrangement, and serve as a general reference.