I measured my tuning peg holes off an 8-year old Warmoth jazz neck using a circle template and the hole is 21/32. The collar fits snugly with that dimension. 11/16 is too large. I have looked everywhere online (well, 2 Google pages worth of sites) but cannot find a Forstner bit with 21/32 dimensions. this is like 16.662mm, Will a 17mm be too large? Please help. I cut math class to often back in the day..