I few months ago I bought a Prs 513 and I never really set it up . It was missing and intonation screw so I bought those screws and the saddle screws . The only problem is , is that the screws in the saddles now will not move so I can’t set the guitar up properly. I think they are rusted in there and some of the screws my be stripped. Anyone ever have this happen , I really don’t want to have to buy a whole new set of saddles.
If I understand you correctly it’s just the saddle height adjustment screws that are stuck and won’t move, so
This has worked for me in the past, thank Dan Erlewine.
1). Remove the saddles from the bridge
2). Put them in a jar and soak them in penetrating oil, just let them sit in it a few days.
3). Make sure the Allen wrench fits totally down inside each of the screws before trying to turn them, you may have to sand down the end of the Allen wrench to make sure that none of the flat sides are rounded off and then gently tap it into the screw. If it won’t bottom out you may have to clean out the rust and gunk out of the screw head with a small needle or a sharpened paper clip.
4). Don’t try to back the screw out through the dirty threads but run it forward and out through the bottom of the saddle.
5). Use more penetrating oil on the saddle threads and then turn the saddle over and run the Allen screws back through the saddle from the bottom of the saddle through the top to clean the treads out of each one.
6). Clean the penetrating oil off everything, screw the Allen screws back through the top of each saddle and reassemble the bridge.