I do the same, but I also ground and then filed down the "teeth" of the jaws on a set of needle-nose Vise-Grip pliers- and used masking tape. Smith locks are way simpler to re-assemble than those found on British and European mfg. sidelock guns. Smith locks are a good design, for their time, but lack intercepting sears, and are a trap for the unwary--hammers must be cocked before you can safely remove and then re-assemble the forearm and barrels.

"The field is the touchstone of the man"..