Dan, you might double-check the pointer knob on your p/u selector. Mine felt like that, then it dawned on me the knob might be loose, and it was. It's .050 allen wrench; re-seat and snug that up, and it'll probably feel right.
The pickup heights are set differently than your P/J bass, where the Activator pickups ride on spring heights like most axes.
0n Alembic 'soapbar' shapes, the drill is loosen the two Phillips head screws you can see. Then reach down thru the holes and loosen the two 'buried' ones, they set your height / angle of the pickups. Once they are where you want them, then use the two exposed ones to lock them in place. BE SURE and just get them snug, NOT hard-tight, as you can break the ears off the pickups !
Since these are low-impedance pickups, you will not hear as big a jump in gain or treble as they get closer to the strings, but if you listen carefully, there is a difference in tone. What's right is up to you. Also, you can adjust the relative gain / blend with the preamps in the back cavity. It may take awhile for you to dial this in.
The five-string adjustable nut is, as you've found, divided in half, with the locking screw under the A-string slot. One more brilliant Alembic feature, as we typically would want the bass side just a bit higher than the treble side. With this, we can leave filing these nut slots to other brands, and simply raise or lower one side or the other. Brilliant.
Strings . . . . are real personal. With fives, you will either fall into the
a) I've GOT to do something about this floppy B-string camp, or
b) This is the way fives are, no big deal
I would only suggest starting with Alembic's 'factory' gauges (45-128), and them branching out from there.
Again, something else that you may find, something I only really noticed with Alembic: With these pickups and a relatively flat amp setting, you might hear a bigger difference between string brands than you did before.
I'd really recommend the FAQ and MUST READ sections for lots of good knowledge and background.
Joey
(Message edited by bigredbass on September 11, 2015)