Also remember that Alembics are preset for the lowest possible string height. The best you can achieve without fret buzzing is usually the factory setting. Trying to decrease string tension by lowering the bridge and nut further can present a new series of problems. Setting up a Bass is for string height and intonation. String tension is something you can only change with the strings themselves. Otherwise, you're looking at changing something in the design of the Bass itself. Until the mid 1990's, American Fenders had the strings anchored to the bridge. At that point they introduced the American series with the strings passing through the body. This made a significant change (I believe for the better) in string tension. I like the definition, sustain, and piano-like ringing of the tone. If you wish to lower the tension, you can choose to pass the strings through the bridge. You don't have that option with an Alembic. Other than using lighter gauge strings, there's really nothing more you can do. I don't think anyone is going to relocate the Alembic tailpiece and drill holes into the top wood to lower string tension.