From day one I've removed the access plate & never re-installed it. I like being able to easily remove any turf that might have wrapped up due to localized grubb infestation. Having a clear view of sprinkler heads etc is helpful also. For example if a head is 2 feet out from a driveway I can simply back up tight to the slab then view progress towards sprinkler to raise then lower after clearing. Small yards so you have to be detail oriented.