software

Hi, I had a custom guitar made about 4 years ago and had the maker put two seymour duncan pickups in, i also asked him to put a fishman acoustic pickup in. My problem now is that the quot;TB4quot; pickup at the bridge broke a few weeks ago and when i took it to be replaced i asked the guy to strip out the acoustic pickup (which he did) and asked him if he could replace the acoustic volume control with a push pull pot to change from humbucker to single coil. He said I couldn’t do this because of the selector switch (5 way prs rotary pot) I just wondered if anyone here had any ideas of how to get around this problem? (P.S. the the way it’s wired now has dropped the volume of the split signal (single coil) to almost unusable. That is the third time it has been in the shop so I don’t want to spend any more money on him looking at it, so I was just going to have a go myself. Thanks for any help. Alfie. (sorry it's a bit long winded)