A scary thing happened to me while cold setting w/a 2x4. I was setting "in" to shorten the spacing, when The stays just suddenly gave way almost completely. they were probably 60mm apart. Mind you, the frame was already bent in the fist place and I was just straightening it out. It did freak me out a little bit, but then considering I only paid 10 bucks for the bik in a thrift shop, I collected myself, reset the frame and went on with my life. No big deal. Although I wouldn't do it to a frame in which I made a significant investment.