I like the dimple idea because its new to me and seems a very simple fix, and it doesn't ruin the paint, but I always just brazed a little silver around the crown, building up the seat and then recut it with a tool. I have run into this a couple of times with my Park crown cutter. The cutter is not self-centering and you can get it off center just a hair, cutting the crown too small, very frustrating. Does anyone have a fix for this problem. I have talked to Calvin at Park Tool and he has basically told me the precautions to take so it doesn't happen much anymore but for a while I thought about making this tool a boat anchor and I don't have a boat.