On my newest Ibanez with locking nut and edge zero 2, i have found that i can tune the guitar to perfect pitch, as soon as i lock the nut off the strings go sharp. Thiis expected, but it goes SO sharp that the fine tuners dont have enough adjustment in them to tune the guitar. What should i do?

I'm looking for a router and I've heard many people talk about dremel. I've been to there website looking at their products. I'm looking for one that can do fine detail routing like on a fretboard. Preferably cordless and one that could fit into some sort of base that could control the depth...