Side Rod rivet?
Stainz Loco: bought this one used and the PDO (previous dimwit owner) replaced the fastener that attaches the side rod to the piston slide with a cotter pin. Apparently the rivet or whatever it is fell out or broke. The side rod was bent. That fixed up easy.
Other than ordering up a new assembly, any tried and true solutions?
I was thinking maybe an 00-80 brass screw facing outward, solder the nut on, then trim the screw so it does not foul any mechanism.