Do I need to worried about the slit in the side of the Survey antenna? Or will water run off safely as long as it is level.
Also should the screw in the bottom of the 5/8 11 threaded hole be tight or snug or loose?
The side slit is sealed, no worries about water getting in.
The bottom screw needs to be sealed, it’s sent like this so it can be shipped with air post. That part is not waterproof on its own, but usually when screwed on top of a surveying pole this join is already watertight.