I know that the Aguilar OBP-3 can have the mids wired in multiple ways including switching, a sweep control and stand alone no selection. This is really a curiousity of mine, but I got this old ibanez varimid preamp soley with the idea of trying a similar idea by modding it to just a switch between two frequencies. I have gone so far as to figure out what each wire connects to as you can see in the pic [brown, yellow, green connect to the mid cut/boost (TOP shaft, B20k), and the orange, white, grey to the sweep (BOTTOM ring, Dual C100k)]. I can wire up the mid control no problem to an individual eq pot, but I am not even sure how to go about trying to figure out wiring the sweep wires in a switchable manner. Not sure if its possible, but like I said, I'm drawing inspiration from the OBP-3. Any ideas?