Hi Scott.
To the best of my knowledge the only I-beamer that appeared was Arts' Atom, I built the model shown for the MAN article. The original was not exactly presentable at the time of publication and had been painted a different color as well.
Again, Rollands' Strathmoor was presented in Air Trails I think but not sure about the magazine. However the original I-beam construction was not shown . These stunters were sheet and block, usually Berry Brothers butyrate over nitrate, a bit over 500 sq. inches, large flaps with not too much travel and a bit of swept forward trailing edges. Earlier ones weighed around 50 ounces and later around 37, 39 ounces. power was of course Fox 35 with a healthy addition of nitro, popular props were the original Y&O 10/5. Except Rod in the Top Flight ad! Right Rod? I do not believe I have any pictures of the Globe which was red and yellow, bubble canopy, fuse landing gear with wheel pants and the tail stinger that was popular on these airplanes.
Don Boka.