It’s wired normally with a 5 position selector. The P90 stack is a bit thicker than a regular P90 and so the body had to be routed out a bit. Depending on which amp I use, it sounds a bit dark unless I turn the tone knob up (I’m guessing because it’s so far in the body). The between positions (P90 & Surfer, Surfer & JD) are nice and have a good balance. I can do everything from Black Sabbath to early Floyd or even Dick Dale type stuff if I want. When I jam at my friend’s and we’ll be playing various styles, I’ll usually bring this guitar.
I haven’t tried the SSL-2, but the Antiquity Surfers are great. Very clean but also sound nice when overdriven. The P90 & Surfer combo is a good mix, at least in my experience. I play through an OR15 and Tweaker 15 mainly.