I'm sorry not to congratulate FMS, but I didn't make it works yet...
Anyway, it seems to be more user-friendly than R/C Aerochopper. And cheaper too
My Futaba R/C Aerochopper Conquest already has a BD9 serial interface (4 proportionnal ways, which meens that the 5th way should be soft-mixed by FMS, and 2 buttons: one to be reserved for Heli Idle-Up trigger).
I suggest to allow Futaba R/C Aerochopper Conquest interface (can I help you ?).
I suggest to allow gamepad-like interface too (game port, okay, but 4 proportionnal ways and common HW).
I hope this will increase FMS users number...