I'm trying to build up my arsenal and would like to reduce my costs by buying used - especially since I don't really always know what I'm looking for. It works for my golf, so why not? My question is how many times can you plug/redrill a ball before it starts to degrade either performance or the ball itself? Are you removing core material when drilling a ball? I would think that after 2 or 3 drillings, the ball starts to become anchor material, especially if you're drilling all over the place...