I can attest to the 46mm stainless and t-nitride hinge pins being junk. In on road I have had ok luck with them but any decent hit will tweak them. I used to run the same pins in my old 501x and without hitting anything--simply landing from doubles and triples they would be bent at the end of a race day. I would literally have to replace them every race day!! So I did the same thing as Niznai mentioned: bought some 3mm tool steel drill blank from McMaster, cut to length, polished and never bent another pin.