Hey Cynikal,
Thanks for the input. I think for starters, I am going to stick to the trike. Having worked in the auto industry, the word "chassis" is more familiar for me than a "frame" (Sorry, it's an inside auto joke
). But yes, would love to try other variants after the trike.
I am still trying to figure out the differential part, although guy153 gave some really good advice above. Still would be cool to get a basic chassis design to begin somewhere.