Install was a little interesting. I made a P90 routing template CNC at work, made the width match the existing rout, drew a tool path 1.415 x 3.415 .25 R corners. I used acrylic that measured just over 5/16th and that was enough to lift the router over the bridge plate and the neck pup but I had to remove the saddles. Fender machined a little well beneath the pickup rout that they used for an extra piece of foam. They had poured a little epoxy in the hole no doubt to keep it from busting out as the back has to be quite thin at that spot. In order to mount the P90, I cut a wood "plug" to fit that hole and epoxied it in.
Got it all back together and sure enough it was out of phase LOL. The tone was very quacky and Strat like, definitely a usable, so much so that I will install a switch later to reverse polarity. The Fender neck humbucker has three wires so reversing the polarity was easy.
Supermassive blends well with the neck pup. Initially sounded a little bright but part of that most likely was from new strings, as I had to reset the intonation anyway I just cut off the old strings and didn't bother to save them.
Had band practice last night from 8:30 to midnight, by the end of the night I could hear the Supermassive singing very clear and vowelly and it didn't seem too bright.
Sounds great rolling off the vol on the gain channel as well.
I went with the black cover.