The instructions for the Canon Mount Adapter EF-EOS R specifically say to first attach the adapter to the EF-lens, and then attach the now adapted-lens-combo to the camera. The instructions further say that to remove it, you follow the same procedure in reverse. Okay... But what kind'a horrible things could happen if I just leave the adapter attached to the camera (all the time) and simply swap-out different EF-lenses as needed? I'm really hoping that everyone just tells me not to worry so much... I'll even promise to turn-off the camera all the time...