Is there a tutorial on fixing cracked pin joints? I've got a few Masterpiece figures that developed cracks on certain joints, mostly the type where one part of the joint is octagonal-shaped to give a soft-ratcheting action. The peaks of the octagons stressed the joint after several transformations, causing stress fractures. Attaching a photo of MP Tracks' shoulder to show the kind of thing I need to fix. Both sides of the white shoulder piece are cracked (the little hairlines in the picture. Before I punched the pin out, they spread apart enough to see the pin). The mating blue part is the "octagon", which I'll be sanding down to rounded once I figure out what I'm doing. As an aside: I'm very glad that the last few MPs I've bought have few joints of this particular type. Where there are pin joints, they're rounded, and not stressed very much during transformation. Ratchet's back wheels and leg panels are an exception, and worry me a bunch.