[neutrino15]

I know that the clock is a bit overkill, but if it is CHEAPER than the slower options... Why not?

Also, people usually use the prog serial port on the RC to communicate with the coprocessor, although if you bought a USB-IO device you could use the PWMS as well.

I am not sure, however, if you can use the TTL port with the TTL adapter. This would leave the prog port free.. Ill try it if I ever get the coproc.