Just got my P-46 yesterday. WOW.
This pickup is ridiculous. I just eyeballed the height, which needs a little adjusting, but even still, this thing is clear as a bell and punchy as all get out. I had to file my pickguard to get it to fit, and I still need to take a bit more off as pickup height adjustments are difficult. Already though, it blows my Dimarzio Model P out of the water, for sure.
I'm using it with my Dimarzio Model J in the bridge, as I figured I could always try the combo out and if it didn't work, order the bridge J. Well, it works great. Together these two pickups get a very interesting, complicated sound.
I redid my wiring as well, used a Switchcraft 3 way switch, (which is a pain to get to fit in a P bass, by the way) CTS 250k volume pot with a variable treble bleed circuit, a Bourns 250k mini pot for tone, (as full size CTS pots don't seem to fit there on my body) with a .047 uF NOS PIO Russian cap. Loving this set up, lets me put the tone control parallel to the pickup, like a typical P, rather than parallel with the volume, like on a J.