Wow, fantastic build!
Question about your pedal side cranks (pic attached). Are you running a 5/8" jackshaft with reamed moped cranks in a bottom bracket shell? Smart- I thought it was my original idea for a cheap wide crank set...oh well.
If so, are those 1.375" OD/ .625" ID bearings in the bottom bracket? And then you use some sort of machined adapter for the bottom bracket shell?
If my assumptions are correct, that'll be two design features I can see in this pic that I will be hijacking for my build. :-)