Trust me the guy that built it wasn't a fan of the phase switch either. I rarely if ever use that feature but I had it on my last bass and didn't want to deviate too far from what I had.
I actually rarely use either switch. I'm just more concerned if it's going to be an issue with the installation.
For better reference, the OBP-3 TK/PP with the mid pot as a push/pull and 1 vol and 1 blend knob.
Hopefully that helps
Can you rephrase the Q with this info? i just got lost. lol