RE: Balsa USA EAA Bi-Plane
I built one. I didn't like the way it flew, but it was easy to build. I wouldn't say it was a builder's kit because of the wood.
It really helps if you are a very good solderer. Wing struts and landing gear can be a pain.
I had a ST 90 in it, and it was too much. Flew much better with a .60 two stroke.
if you only use the bottom ailerons, make sure you have a bunch of travel, and can fly with rudder.
Bill.