hmm... the only problem I've heard is when people adjust them too tight the retaining bolt snaps clean off at the head after a bit of hard use but again that is only if its adjusted really tight like an 1/8 turn off instead of the 1/2 turn backed off. I've not heard its a common problem son the TC3 though. I've been runing my electric TC3 with a novak Bl and have yet to have a problem.