Re: New JEM 77FP2
>Floating Bridge - Edge, Lo Pro, Edge Pro, and all of the double locking Floyd variants are adjusted by raising and lowering the trem studs that the knife edges pivot on. Edge and Lo Pro guitars - There is a small 1.5mm Allen adjustable set screw inside the studs on all Edge and Lo Pro equipped guitars [ONLY Edge, and Lo Pro guitars] that must be kept tight for the best tuning stability. Never try and loosen it with the allen wrench but use the 4mm Allen to back out [Lefty Loosey] the studs a hair to free the set screws. If raising the action raise it until it's correct and retighten the set screws. If lowering the action use the 1.5mm Allen to back out the set screw enough to allow the bridge to be lowered. When correct retighten the set screws. Important! After you've tightened the sets using the 1.5mm Allen use your 4mm Allen to take the slop out of the threads between stud and insert to really lock the threads together and give a very solid fulcrum for the bridge.
The amount of slop in the threads will depend on the mate between the stud thread and insert thread. They won't all be the same. Some will take a 1/4 turn [especially if it's a stud mod for EP], and some will take just a hair of rotation to lock. Knowing which will let you know if you can set the final action first, or have to leave it a little higher for the tightening to finish setting the action. But your studs aren't locked until the slop is out of the threads. You're just trying to get the slop out, you are not trying to weld the 2 pieces together so don't try grinding everything together or you'll either break the head off the stud or spin the stud anchors in the body, use good sense when applying torque, but you do want the threads locked together.