The locking screws will fit, no problem. As Newc said, going from Schaller to Gotoh will cause problems. I can confirm that a Gotoh will retrofit an OFR route.
The cheapest I've ever seen, were the OFRs that Ed Roman sells. You may want to look into them as well.
The cheapest I've ever seen, were the OFRs that Ed Roman sells. You may want to look into them as well.
Comment