[oldschool]

I have been a big fan of the 3 wheeled , 2 seat configuration for a while now, although I prefer the motorcycle frame grafted to a car front end. I think this would be a great platform for a full time ev or a hybrid with a full time electric motor. The light frame weight would lend itself to a smaller motor and less battery weight.

You folks were comparing material for body panels above, what about foam board sandwiched between fiberglass? Would seem to me to be as light as it gets.