Cliff put in Nordstrand Big Rigs and the Darkglass Tone Capsule (at my request, just to be clear), but I switched to a John East Uni Pre for the preamp.
I've tried every flavor of Darkglass and was curious about the Tone Capsules frequency points, but that was the final nail in the Darkglass coffin for me. I love the sound of Darkglass stuff in demos, but in personal reality I've never vibed with "the Darkglass sound," which it all has. The East has a warmer sound, with character that's its own but reminds me of Aguilar. It also has much more flexibility with parametric mid, bright switch and tone knob.
5sg.
I've never been able to get on with darkglass either. But I love my big rigs. I considered a John East with mine too, but ended up with a richter which paired nicely in the bass I put them in.
Beautiful bass. I'm glad you were able to rescue it from darkglass.