S-Express
Guest
And may have done so and damaged them. Clearly if you don't clamp the frame then you're guaranteed not to damage it that way. Zero risk is far better than some risk, do you not think?
There is no risk of me damaging a frame from clamping it, because I am a) not a ham-fisted gorilla and b) I know what I am doing. I can't speak for you or anyone else. But the fact that I have never damaged a frame in a clamp, suggests that the clamp itself is not the issue. The issue is with the people that do it.