Jeroen wrote:
I would try aligning the poles (not the screws!) exactly at the same height as the poles of the original singlecoil. Leo Fender had thought that position out very well, sonically. It's exactly at a harmonic knot in the open string length (as with the pickups on a Strat, Tele or Jazz). For example: Try playing a 5th fret flageolet on a Strat with just the neck pickup selected. You'll barely hear a thing through your amp, because the distance from bridge to polepieces is exactly the same as the distance from the nut to the 5th fret
. Same story with the Telecaster Bass singlecoil.
+1. they don't call it the sweet spot for nuttin'.
FYI: I've seen several players install Darkstars upside down for a different tonal variety. I'd suggest routing for the proper placement as indicated by Jeroen but experiment with the PUP right side up and upside down to see what you prefer.