Hi. My first post. I've recently started whittling as therapy for Parkinsons. Found a nice series of videos on YT that show me how to make a little man in stages. Trouble is, whenever I achieve a particular stage the knife strokes on the following stage tend to destroy the previous. For instance: I make the top of the hat then am meant to create its rim. I place a single cut around the base of the hat to begin up strokes that should produce the rim. I believe the lady in the film would call this a 'stop cut'. Trouble is, there's nothing seemingly going to stop my upcuts! The blade carves through the wood then carries on through the cut ridge and damages the hat above it. I'm unsure whether Im using a cheap lime (I buy it on Amazon) or what. But Ive tried to work on three men so far and all comes to nought. Damaged shards of lime seem to fall off anything I do and I try to be so careful. Any thoughts? Any comments very appreciated.