"activating" an OLP MM2 bass

I have a first series OLP MM2, the one with the passive treble and bass control. when I bought it, all three potentiometer axes were broken off and instead of getting new pots for this passive setup I decided to make it active.

The circuit is the original Stingray 2-band EQ. I did not want to route a hole for a 9V block battery holder, so the tiny 9V battery will do. I made a battery holder from a cut down AAA holder and a 3D printed frame to hold it together. The stingray EQ asks for a 1M reverse log pot for treble, I just put a 1M linear instead.

http://www.talkbass.com/threads/activating-an-olp-mm2-bass.1121539/