E:

Probably fine without the sheeting, when I scratch I tend to go heavy. Never break one that way. Sometimes they're real lead sleds, but I dont break them.

I've gone too far the other way also, though. Just trashed my first prototype for the Duellist 2/15, almost no internal structure in the afterbody, 43" long, 1/16" balsa skin. Mounted the tail feathers, grabbed the fuse at the wing saddle and shook it, tried to make a fan - checking for resistance to aerodynamic loads. Reached down to pick up the tailfeathers, and got my broom and dustpan to pick up the shattered afterbody.

True story. Haw on me.

Bill.