Mine has the little tab, and even using that, and releasing the cam lock, the "rubber" still sticks to the plexiglass. I like that it holds so well, it's doubtful this will ever fall off when you don't want it to, but I fly a club aircraft and have to get this off after each flight. Something else I discovered, is that random stuff from my flight bag (dirt, lint, rocks, etc.) sticks to it. This stuff all rinsed off nicely with water, but didn't seem any to eager to come off by brushing with my hands without water. I'm going to try to make sure I re-attach it to the plastic film it was shipped with after each use.