Re: P-Rails Hot
It doesn't sound like any other pup.
IMO, the P-Rails Hot went too far...hotter wind AND two A8 mags. It sounds very heavy/muddy. Much better with A5 mags. Or, mount it with the rail toward the bridge, put an A5 mag next to the P-90 and leave the A8 next to the Rail. When it first came out, I did a lot of experimenting with it...mag types, orientation. Check my former thread for a very detailed description of that process and my findings. I think it was called..."P-Rails Hot...is it supposed to sound this way", or something like that.
If the guitar you are putting it in is natually a very weak/thin sounding guitar, then the P-Rails Hot may work good for you, but I still think you will have to do some mag swapping to get it to be satisfying.