Don, the Weasel looks to be a "legal" F5F airframe:
Although Bob's website indicates a wing area of 34dm2 (below the 36dm2), the FAI definition of wing area includes the area for both the wing and the stab. I believe if Bob checks again, the Weasle will qualify. As such, I would place the Weasle on the short list of lower priced F5F airframes.
(someone should pass word to him!)