I use them for some months and it is fabulous!
While a bit expensive but easy to mount, and a formidable precision no play or anything to make a little unpleasant to use mechanical
They are mounted on an Ibanez AGS with a bigsby, a nut and an easel with wheels and I must say that no more tuning problems!
I think a head flying v style would be the top so that the strings pull straight!
Very good material
I do not put 10 because of the price but the quality pays ...