Same here.
I also make sure all the pole-pieces are flush with the cover first.
When I'm adjusting:
Nearer the strings for: more output, fatter, thicker, warmer
Further from the strings for: less output, clearer, brighter
The bass & treble sides don't have to be the same height (I tend to have the bass side slightly lower).
Personally, I'm more interested in getting the bridge pickup spot on, so I tend to do the bridge first, then balance the neck for volume (and for a tasty middle position).
I only adjust pole-pieces if it's absolutely necessary (a particular string is too loud or quiet) - not happened on BKPs for me :D
Oh yeah - I spent weeks fiddling originally, every day :lol:... nowadays, I get what I think is reasonable and live with it for a few weeks, then review it and possibly change it, then live with it again...