I've just got a new tele & the nut on it is rather fcuked so I want to start doing something like this myself. According to the specs it's a 9.5" radius with 41mm width & was thinking of putting an earvana one in, but from what I can see they are either that size but with a radius of 7.25" or 12" so do I need to use the 7.25" one? or shall I just buy a piece of bone & sand it down to what I need?