I'm rather limited on funds and old wood does all manor of things. I shim or add wood and re inlet if needed. Where the shim goes is pretty easy to determine. If the wood is proud at the top tang, shim at the top. If the wood fits perfecta shim under the trigger plate works. Store bought waxed paper works well for minor shims, wood and re-inleting for major stuff. I've had a couple drillings that the side safeties that would bind and a paper shim or two under the trigger plate solved the problem for a couple cents. The drilling now shoots safely and usually brings the tang screws back into proper alignment because the wood has compressed over the years. Because the trigger plate is shorter than the top tang the compression is there.
