I didn't read many of the replies, so I'm not sure if this was mentioned. The pro at my tennis shop told me he recommends I set the tension about 2-4 lbs higher on a crank to get my desired tension. So I've set the crank to 62lbs if I want ~60lbs tension on my stringbed. Tension has felt great so far.
One thing to be wary of: if you tighten your knot using your crank (some people do this) be careful not to overtighten! I've popped 2 strings on the very last knot because I got too anxious. The reason you'd even consider it is to avoid losing the tension right after your clamp. I'm not sure if it's even worth it.