Touchy, touchy. Don't take it personally. I can build anything but because I actually enjoy building, I like wood. I've seen some light foam wings, but usually not. It just depends on how much time someone is willing to spend cutting a lattice-work from it.

I've yanked on my planes pretty hard to include terminal velocity power dives ended by cranking back the elevator. I fluttered off a couple elevators back in my early R/C days, but I've never folded a wing ever.