Hey Zandit
Interesting idea, have you thought about using a wooden archtop bridge and inserting a rod piezo into it. You'd probably need to then use a tail piece. You could also put in an electric pickup for more varied sounds. I used to do something similar when I made CGBs
I would definately go neck through for strength. As for the sides you could laminate together a few sheets of thick ply and then cut your shape out??
There is also a kit available out of china not sure though if its the same company Adam deals with??