I was wondering what modifications would be necessary to use a PICA board with a Re-ARM controller. The only pins of the Re-ARM that are not 5v-tolerant are the analog input pins, so would it be sufficient to replace the 5v regulator with a 3.3v one? I'm not using a LCD or optical endstops or anything, so the only issue I'd have to work out would be powering a servo. I have a ton of 7805s, I could just provide 5v externally (I think...)
EDIT: Just to clarify, this question is only about hardware compatibility. I know that Re-ARM runs Smoothieware by default, but I'm comfortable with setting that up.