I just did a little mod tonight.
I put in a killswitch, but I didnt run it through the pickups. I just made it like you would make a killswitch pedal but I drilled a few holes and now I have 3 imput jacks and a nice new killswitch. I know it may not be the best way to put in a killswitch but I wanted to be diffrent and it works great.
pics
before

next to it is my killswitch pedal, I basicly just put it into the bass
After
I fasioned a plate that all the jacks are in.