This was the recommended accessories for properly mounting an Axis Q6100-E dome camera to the ceiling.Glad I sat down with the mount prior to being on a scissor lift 35 feet in the air. Compression ring inside mount creates a seating nightmare for the technician (you need that ring to keep the gimbal in place). No video exists for this mount, just the A model. You can clearly see the person in the "A" video installing it didn't bother with two of the four screws (not flush mounted). After trying several times to mount it, brough it back to the bench. It will go together with some wrangling on the bench. My pro tip is to put the mount together a couple times on a bench flush before attempting to mount on the ceiling.