I will be returning to Las Vegas in March. Las Vegas is a town of tipping and that tipping goes a long way. I have read on this board and in the Silver Strikers newsletter that some casinos trade to complete sets and sometimes if you're lucky enough you can buy strikes at the cage. My question is: If you are trading to complete a set, say 4 or 5 strikes or you are lucky enough to be at the right place at the right time to buy a needed strike(s) that were turned in, what would be the appropriate tip to the person at the cage? Thanks, Ken...