Re: Phat Cat, volume and tone controls
What kind of guitar are you putting these in? I've got a bunch of Phat Cats in various guitars, and have switched the magnets in all of them. Personally, I don't like the A2's they put in them, for my LP, SG's, and 335's. But the stock A2's seem to work better in Strats and other bright guitars.
In some guitars, Phat Cat necks can pretty dark with the twin A2's, too dark for some on the forum, so a number of us put in an A5 or two. I've used these pairs in the neck: A5/A2, A5/A3, and A5/A4. A5/A5 would give you a Gibson P-90 type tone. These give them more open, single coil tones with some bite. In any magnet pairing, they require 500K's on the neck.
By comparison, the bridge Phat Cats sound on the thin & weak side to some of us. Again, magnets come to the rescue. I like an A8/A4 pair with 250K's, although an A8/A5 or even two A5's would also be good. Being single coils, they don't have the focused midrange of an HB, and I like a bridge PU with some body & fullness.
For me, I'd make one pot a 500K volume for the neck, and the other, a 250K volume for the bridge. On a two pot guitar, I've also hooked up a 250K tone pot to the bridge volume, wrapped it in bubble wrap, and put it inside the control cavity, to get the extra warmth from it. The neck doesn't need a tone pot.