I wonder if anyone can help ? I recently took an eBay gamble on a John Birch Customised 1961 SG Les Paul Custom, basically due to the 3 original PAF pickups. I had in my mind to used the PAFs on another guitar and make good to the Custom, The guitar turned up to be a honest and very nice guitar, Original paintwork etc and does look and feel a genuine example of a Vintage guitar, with obviously the exception of the Birch Modifications . So here lies the problem does anyone know anything about this particular John Birch Customisation, It basically has a master volume knob on the pickguard, opposite the normal Volume/Tone knobs it has 4 other, a micro switch on the bottom, a 2 way knob switch above that and 2 pots above those. The back has been routed for active electrics which appear to be wired to the middle pick up, with a centre route for the battery. Now I am not sure what all these Knobs actually do, and at the moment have the guitar partially striped to see if I can work anything out. So does anyone know anything about these modifications, do you think its worth keeping them or Filling the rear route and returning the guitar back to a made good custom ? The pot holes are quite neat and I think could be filled and painted to match without looking to out of place. And the back of the guitar would just have to be made good. Its a difficult decision to make without know exactly what the John Birch Customisation is all about. Thanks .