Not sure if I am flogging a dead horse (or dead thread) but just in case there is still interest, I just finished installing a GraphTech Ghost Saddle-loaded Hipshot bridge and a GraphTech Acousti-Phonic preamp in an older Carvin LB 75 five string fretless. I use a DarkGlass Tone Capsule for the mag pickups. The sound is out of this world, no clack. I am willing to answer any questions.