The 8 string that I sold had been modded before I got it ($500!). The original DiMarzio Model G pups and circuit board were gone, replaced with some old Bart "Hi-A" pups that, like the guitar sized EMG HB, were a split P style inside a 'bucker sized housing. Like most Barts, they did nothing for me, so I ditched 'em and installed EMG HB pups and BTS pre amp. Better... Also, the original Badass 4 saddle bridge had been replaced with a cool, brass 8 saddle beast that I suspect was made by Stars Guitars. Brass nut too, which seemed like a waste since Kramers have a zero fret.
My fretless is still with me, and is the only bass I own with active pickups/pre amp.