Dustin Kensrue Musicman Issues

So, as I am sure you all know, the Kensrue musicman has the stereo output. The switch on mine refuses to stay on and I have no idea where to get or even locate a replacement. If you all could help me pin one down that would be amazing. Also as far as set up goes, it comes set up with a special set of 11s in d standard, would setting it up for standard require a new nut? Could the truss rod even handle that? I have been cranking down the truss and there is still a crazy amount of relief with just 10s on. Not sure if I got a lemon or what. I love the guitar I just can’t get it to play right. I had it set up, then a week later the relief was back to a crazy amount.