Congrats on your Essence Five, Michele.
You will find that ALEMBICs are 'Set-Up Workshops'. The adjustable nut frees you from filing or filling conventional nut slots as needed. The bridge is one-piece, matched to the fingerboard radius, so you skip a lot of argy-bargy vs. a conventional bass bridge. The double truss rods give you more control than normal.
Couple this with a five-piece neck topped with 1/4 slab ebony on a vintage 1999 guitar (yours), the action just isn't going to move much; and if it did, you have many more tools to tweak it than normally seen.
I essentially shoot for a dead-straight neck, and let in a little more relief until it no longer buzzes through the pickups. It may squeak a little unplugged, but once you're at that point, you've got all it's going to give you.
I'm really convinced that somewhere out there, there are some fretted ALEMBICs that would play just fine with a dead-straight, zero-relief set-up. Which is actually impossible, but I wouldn't rule it out.
You've come to ALEMBIC at the right time, having owned a formidable selection of other great basses, and there's lots of good ones out there.
ALEMBICs are not for everyone, not everyone gets it, or hears it.
You have to remember, they invented this game. A lot of their features existed in some fashion in other brands, but no one ever put them together like this, before or since. These things are like Bosendorfers or Selmer Paris horns or D'Angelicos: There is no substitute. There's lots of great axes out there, but they're all just everything else.
But for someone that can appreciate the construction and the tone, nothing else comes close. In a world of 3-band EQ's on basses (who thought that was a good idea?), you've seen so quickly that your hands, a pan pot, and a filter stack can do an awful, awful lot. Who knew?
And you'll find they're built and supported by the best people in the world. ALEMBIC is a very small family business, yet all of us here are all recipients of the Wickershams' good will and encouragement. Hard to get on the phone sometimes or via EMail, but any of us can tell you about buying a used Alembic to start with and being treated like we just placed an order for 12. Just the best.
So have a ball, and welcome to the Club!
Joey