Well, I flew the plane yesterday. It is a screamer! 4.35 ounces, 35' of lightweight Spiderwire, and it clocked at 54 mph!
It does loops, flies inverted and outsides and figure-eights. For a Scientific design, it is a winner!
I need to add decorations, but it has a good epoxy finish as a base. Photos when it is done.
The Space Bug seems comparable to a strong Black Widow, but it is lighter and has more tank capacity, as Andy Borgogna can attest