I've had success tuning with a fingernail machine. I don't know what the proper name for it is, but I got it at a drugstore. It comes with different tips and it has something to do with ladies' fingernails. Anyway, it comes with different tips, and you put a tip on, and it spins, and works for tuning. It cost about ten dollars u.s. when I bought it four or five years ago. I read about it here on SlideMeister.
Norm