ETS-Lindgren 2115 Multi-Axis Positioning Systems (MAPS) - Manual (Page 29)

Installation | 29
If installing the MAPS in a pit, mark the amount required to raise the unit up to
level. Remove the top of the turntable and begin leveling.
5. Verify that the unit is level.
Attach the wooden turntable top
(Shown with optional dipole mount base)
6. Position the wooden turntable top on the turntable base.
7. Use a 5/16 Allen wrench to tighten the bolts.
8. Secure the turntable top seams in place with a Phillips screwdriver.