Sausage was the original Primus lineup, and he did an album with them some time during Primus' heyday. He said he used the Jazz back then so he did the album with the Jazz. I saw old video with the old lineup and he was using the CT 4-string, though. He also used a Tune fretless 6-string to record Sailing The Seas Of Cheese because his CT 6-string wasn't done. But he's used different CT's throughout his recordings, so naturally they would sound a little different, though they all sound like Les to me.
Ampeg Portaflex Club #1