Westone Thunder active preamp

[Sambrook]

Hi there. I've just got a fantastic Westone Thunder III fretless from a fellow Basschatter. The active preamp is on one knob ( bass boost one way, treble boost the other). I was wondering if I could rewire onto a double pot, and so be able to boost bass and treble at the same time. If that makes any sense, and any body can help, I would much appreciate it. Thanks!

[Mr. Foxen]

Probably best off swapping in one of those Artec preamps ready made, someone will probably buy the Westone preamp.