Scalloped fretboards have the wood between each fret carved out to form a downward curvature.. This gives the player a feel of the entire string under their fingers without touching any wood, thus gives a more accurate fretting position for the fingers especially in the higher frets where it is very narrow.. Downside is, you don't have the wood feel of the fretboard and you need to control precisely how hard you press down on the string to keep it in tune... Tonewise, it's the same...

Single locking trems are very much like all the FR trems you see but the strings are not clamped down at the bridge, like a normal Strat trem.. For double locking, the strings are both clamped down at the nut and also at the bridge..

FR trems (with a routed cavity) are floating trems regardless of it being single or double locking... that is, it balances on a knife edge by the posts and it can rock up and also down... the trem is balanced on the middle point by the tension of the strings countered by the springs at the back... So if you break a string, the string tension reduces and the springs at the back pull the trem out of balance.. you'll get the idea... This is the main drawback of floating trems...

For non floating trems like the old 6 point fulcrum strat trem or any other trems with non routed cavity, you can only dive the trem but not pull up as movement is blocked by the unrouted guitar body... So if you break a string, the bridge still stays at the middle point despite being pulled by the springs at the back..

This post has been edited by nkphnx: Aug 19 2008, 09:27 PM