Been using Chris's for 12 years now, really easy to adjust the shape from a nickle to a dime. Once I used it, I realized it was the nuts, and have never ever considered any other way of shaping them. Only time I don;t use it is when I put on snooker tips ( real small ) and they were easy to shape with some 220 paper etc
Tried a couple of tips with the razor blade at the beginning of my journey into cue repairs, but I kept thinking about the blade getting ripped out of my hand and landing in my eye or cutting some part of the body or worse.
This is about the only way to shape a laminated tip. IMHO