After playing the 24CA for a while, I am liking the 2-band preamp for sure. I rewired the pickup to parallel as it should be, with the expected drop in output. But the bass still wasn't getting quite what I was looking for tone-wise.
I have a Nordstrand MM4.2 that has arrived that I will install this weekend. I think that will get me the tone I am wanting on this thing. Other than that, I am really pleased with the fit, finish and playability of the bass. I think it will ultimately get me exactly what I have been wanting.