Originally Posted by
Simon Barden
On the bridge saddles, the smaller, moveable saddle has two holes its fixing screw can use. I think it comes fitted in the rear hole as standard, but it will need moving to the forward hole if you are going with the normal' octave string on the bass side' arrangement. The octave string will be intonated with its saddle further forward than standard (thicker) string saddle.
With the rear hole being used for the fixing screw, the smaller saddle can be moved backwards from level the main saddle position, but not forwards. With the forward hole being used for the fixing screw, the smaller saddle can be moved forwards from level with the main saddle position, but not backwards.
There are two saddle fixing holes present so that the same bridge can be used for both right-handed and left handed applications (or if you want the octave string to be on the treble side of the pair, like Rickenbacker - though you'll need a new nut cut specifically to do this).