The cell is just a plywood triangle with its sides tangent to a circle at the 60% zone of the mirror and hole cut for fan. Push /pull bolts on the three corners attach the triabgle to the tube. There is about 16 X 1" square pads. Thats a lot of holding power.I've never had any qualms about transporting the telescope with the mirror weight in sheer against the Velcro. It takes two or three minutes of sustained leverage with a piece of 3mm plywood to seperate the Velcro if I need to remove the mirror. Velcro has the advantage it cant warp the mirror like silastic. I'm not saying this is for everyone. It works for me in this size range.
