Do the math first and double check your work. Use a vernier caliper to measure the tuner pins, etc. put masking tape on the head to mark lines on. Use a combination square to mark a center line for holes on the head so they line up straight with the edge of the head. Measure twice, use an awl to pre-punch the center of each hole. Put masking tape on drill bit to mark drill depth.
*1962 Jazz. '74ish Ampeg V4B, 115/210. * '75 Gibson G3. *Epi Tbird. *Squier: VM Jazz, CV 50's P. *Squier VM Jazz Assoc. *MBC 641. Squier owners club