I did go to the woodshop this afternoon armed with a roundhead bit for the router table and gutted the body planks. They came out great, exaclty what I wanted it to be. Attached is a picture of one of the fins, the bit I used, a couple of shots of the plank's ends after the gutting, and a dry fit of all the components.
I weighted the parts this morning before going to work and the total weight (body, nc, fins, transition, internal BT) was about 3.75 oz or approx 110 gr. The body itself was about 2.6 oz or approx 70 gr. Now it is about 2 oz or about 55 grams. I will work on the rest tomorrow evening or on saturday. I think this is going to be on the >4 oz range when it is completed.
Today on my way back from the woodshop I stopped at Michaels and with my 40% off any item I bought 1/16" and 3/32" balsa sheets so that I can try Sandman's idea. I may also go to the trophy shop and try laser cutting a set of wings and a BT-55 in half. The centering rings may get done this weekend.
The last thing is a name for this one. I have one in mind inspired on an old anime series from late 70s early 80s. Will not tell until I am satisfied with the name...