I used about a dozen biscuits and then sold my PC-557 (which was a wonderful tool) to someone who would use it more. The pocket hole jig I would miss more. A Kreg mini is only $20 complete and can do many jobs where a few pocket holes are required. I use the mini a lot despite having other Kreg equipment so I would not hesitate to sell what you have if you could get a good price. Otherwise, for the cost a half a dozen boxes of dominoes, I'd keep it.