I did buy a set of the oversize blanks and fit them myself , As you think if you go slow and keep testing the fit they will come out perfect . I am planing to make some grips this winter , I am going to try using some black Corian . There are several grip makers using corian , I you try the color butter It appears very close to aged Ivory I belive . If you call Freedom arms for a set of grips have your serial number handy as they changed the grip frame at the point when they changed from a nut holding the main spring in place .