I'm looking forward to seeing the footage!
I definitely agree with your assessment for the through-wire, especially with a wood like Balsa. I'm trying them out of pvc, basswood, poplar, and cedar. I'm making these in different sizes, from 1"-4.5." The smaller ones will definitely have some sort of through-wire, but the larger ones I'll just use twist eyes.
It looks like the buoyancy of balsa really helps give your baits a great action!