Stearman is looking good!

I don't know of anyone doing a 1/3rd scale on at all. You could take the Mark Frankel plan and have it blown up to the size you want at the copy shop, then build a plug to make a fiberglass fuse mold and cut the wing cores from foam. Certainly doable. As far as laser cutters get in touch with Bob at Laser Design Services. He is great at working with modelers that have custom work. There are folks here that have certainly done those things before so I am sure if you look around in the scratch build forum you can find some examples of how to to do that.

Good luck!
Mike

The resources alone are worth the membership, plus there's always plenty of help if you need it.  

I did build a 1/4 scale T-34 Mentor. After building it I covered it with litho aluminum and has all the details included. Then I went on to make an all composite aircraft from my molds. As yet I have not had the time to make a full kit out of it but I hope to do this when I finish my present aircraft. A point worth highlighting is that if you are going the scale way then it is good to know beforehand that this aircraft has many corrugations (I hope this is the correct word). I believe the number is well in excess of 350. Also at 1/4 scale there are few engines that will go inside the cowl without having the engine head sticking out! In my case I will be using the OS FF320 Pegasus engine. Anyway here are some photos.

Reuben

NOSE GEAR DOOR MOLDINGS

COWL OPENING DOOR MOLDINGS

Later

Reuben