Hello all, I'm new here and recently bought my first Custom S guitar secondhand from a guitar center. When I picked up the guitar, I noticed the allen screw meant to keep the tremolo arm in place was missing and nowhere to found so now it's always moving or popping out if I lean over which is really annoying. Anyone know the size of this screw or where I could potentially get one? Obviously with the FR 1500 being exclusive and all I can't find anything else on this anywhere...