Hi. I'm considering adding a Schaller Roller Bridge to a '72 Mm. I did this before on a '78 I refurbed some years ago but don't remember how I located the proper spot. Gonna need to drill new holes. I've already upgraded the pup to Aero direct replacement and want to continue to improve this bass if possible to make it a bit more of a player, not just a novelty. Any input would be greatly appreciated. Thanks, Bob