robweidner:
I am also struggling with this sketch. I am using the Elegoo Mega1560 and keep getting the##avrdude: stk500v2_ReceiveMessage(): timeout
I never seen a ellego mega1560 before. If that works same way as meg2560, my advice is to remove your custom ciruitry first. Then try compile and upload a test led blinker sketch. If that works, try compile and upload the futaba compiled sketch.
Once you knos you csn upload a sketch to the bare board, then move on to adding circuits to test the software that it runs.