having the old miner remove your picks and charge you for it would just be too much krim. at least not items, maybe a zeny value instead as you might not always get those items when mining, and with no way to get rid of broken picks it would just become insane. it would have to be a relatively minimal value of zeny though. something like 100k for every 75 picks, seeing as you can get 20 picks for 15k.