I made the same mistake. Upon better inspection, the bolt acting on the wedge holding the bars is stainless. I made the mistake of thiking that the stainless would be slightly magnetic as SS usually is. Some sorts of stainless aren't and this bolt is one of them.
Kurt Sperry Bellingham WA USA
> >I think Chuck has the answer. I assumed the bar clamping bolt was
> aluminum
> >because it was non magnetic, however on disassembly it is too hefty for
> al.
> > The expander bolts are aluminum though...sample of two.