hey guys, got an 66 bandmaster and replacing the OT with one that has 3 taps for 4/8/16 ohm. At first I was thinking of using the external speaker jack for an 8 ohm tap and the main speaker jack for 4 ohm. But looking at the jacks its seems the negative feedback is connected to positive and the main jack is shunted to ground when unplugged which makes it complicated. So then I thought I would use the beefy polarity toggle switch which is not in use after the 3 prong chord was put in. I could just toggle between 4 and 8 ohm but Im wondering if it will introduce more noise having the OT wires run between the power tubes. What do you guys think?