Model 1650-00 Nut Slotted L42.01mm (Select Material)

I tried to order the one that seemed to be the right size for my G&L Asat Classic I was able to get the right string spacing and also width by following the one that was set up for a Fender however the thickness is the wrong size. I had to use a piece of cardboard to make up the thickness when glueing in. You can't just look up Gibson or Fender or G&L or any particular guitar. I do understand that even those guitars within years or slight model variations may use different sizes but this is just ridiculous. It is tough to measure the nut unless you have special tools. I used a tape measure and was able to get the string spacing correct and width of the nut. however I was off on the thickness of the nut, still sounds good but could have sounded better with the right fit. Also with the nut being narrower you take a chance on the nut not being straight up and down and can tilt forward or backward.