I built a lot of those sheet balsa planes from kits & hung my Cox .049 Bee on them. I think they were Sterling kits. I bought my hobby supplies @ "Arts Camera Shop" on Burnumn Ave in Calumet City, IL. I remenber a single engine P-38 profile & a Focker D-VII. The Focker was really nice when I finished it but my 22 year old brother (I was 15) insisted on the maiden flight. He did a wing over on the first go-round & put it straight in on blacktop in the school yard.