That is a really pretty bass and I am sure it sounds awesome. Enjoy getting to know what it has to offer you musically!
Not sure it is necessary to change the location of the upper pickup screws but if you aren't certain how to adjust the height be sure to read this. It is one of the many useful FAQs found on the home page of the club.
https://club.alembic.com/index.php?topic=214.0
