Originally Posted by
scarlson
Anything anyone wishes it had but it doesn't?
Well, Mark who makes them says that of the many he's sold, a few that got heavily used eventually wore out. He considered making them of alloy steel, but it would double the cost, so he opted for keeping them affordable for the 99.9% who
won't wear one out. But if you're making your own, why not make it out of 4140 or tool steel?
Other than that, it's a pretty refined design, so you should probably try to copy it as faithfully as you can. Definitely use a heat-treated alloy steel bolt for the pusher. Cupped on the end to match the typical radius on cotters.
Mark B