Now this solution might be "over kill" but If it's really important to you not to see the repair, AND it's a Large Siler type lock. There's the option of purchasing their Gunmakers lock. I don't know if they just sell the plate or not. But make a paper or poster board pattern of your inlet and cut out the plate to fit.I know this is over the top and an expensive option, but it's just another idea. Sometimes these inletting errors result in grain patterns, dull tools improper choice of tools for the task at hand. Seems the easiest way out is to replace the bad parts with a slightly over sized piece. Glue it in and to clamp it for a few hours. If you can't get a clamp to hold securely, then it can be wedged from the opposing side. Then more carefully re-inlett the lock plate. We all hate mistakes, but they happen to most of us. Personally, I wouldn't go the gun makers lock plate route. It's allot of extra work. ...Geo.