I don't fly 3Dplanes like the U-Can-Do, but there's a guy at our field that just about exclusively flies them. He repairs his gear only to the point that it will handle a regular toreasonably rough landing. Hisrationale is that he doesn't want to take out more of the belly of the fuse than he has to on rough landings.Essentially, he repairs them so that they can intentionally fold up again but not enough to cause even further damage.

Since 3D birds are built to be so light there's bound to be a weak point, and the gear is usually the prime spot for this.