TD-3 balsa replica build

Bob's recent threads on the Cox TD-1 and TD-3 got me interested in building one or both of them in balsa. I don't have access to a TD-1, but my LHS has a TD-3 in the case. I was able to borrow it to get the needed measurements for a replica.
No beauty queen, it's been "rode hard and put away wet". No matter, it is good for what I need. My first impressions were that it is smaller than expected, and very light weight.


I was surprised by how light it is. I don't think I will be able to equal 5.2 oz., let alone beat it.


Since I retired from my retirement job this year, I no longer have access to a CAD system. Pencil & paper still works, but is tedious by comparison.
Wing area works out to only 64 sq. in., so it really needs to be light.

Here's the pieces I have so far. Yes, it's going to be a 'hollow log'. The fuse shape doesn't lend itself to sheet construction, and I didn't want to loft formers or plank them. I'm not going to replicate the corrugations in the wing, but I did set the rib spacing to match their locations.