crystal controlled at 3.686MHz. I'll need some guidance about how to handle the initial reprogramming based on this clock speed.
I'd replace the Xtal with a 16Mhz version as I doubt there's a bootloader set for 3.686. Maybe you can recompile one of the existing loaders though.
5-pin programming header already on the PCB
Curious, the standard ISP header is 6 pins.
Rob