Yes, the bass was modified before my brother bought it and has remained unchanged since. I was a little skeptical because I had little experience with Lace pickups, and I questioned if the addition of a bridge pickup in this context was useful or necessary.
Well, for my tastes and usage, and I suspect for most players, I find myself more in need of bridge pickup than another neck pickup to bi-amp out for a big, bassy tone. I tried using both the pickups on full today for a bit, playing the same parts back to back and switching from just the splitcoil to the P/J split. Usefully, the volume balance for both pickups is very even. On something like my Pentabuzz, the splitcoil always dominates even when both pickups are running on full. The P/J mode on this adds a little more snarl and notably more 'tightness' in the low end, which may be a result of the inherent mid-scoop of running two pickups together like that. Either way, it makes an excellent noise, almost a Geddy-esque bark, and that's through the EBS Billy Sheehan pedal rather than the GED-2112.
I suppose my results in playing this bass must be tempered by the pairing with that EBS pedal, it really does what it says on the tin and gives you that Billy Sheehan overdriven sound on tap, with an almost unseemly ability to let the clean tone through with the overdrive almost on top, rather than just blowing out a foul, brash overdriven sound into your amp. The EBS engineers clearly put the work in studying Billy's Pearce preamps to emulate their sound like this in such a small unit. Gushing about the Attitude aside, I really think that is the best pedal I've ever played through. I wouldn't be without one now.