Does anyone know if you can secure the tripod collar to the lens so it can't possibly "rotate" off? Grabbing the tripod collar is a common sense way to handle the lens, and I did that with my Nikkor 300 whose tripod collar couldn't be removed. But one of these days I'm going to do that with the Canon 300 and I'm going to be holding the collar while the lens goes and does something else!
I know that removing the collar reduces weight, and that may well be useful to some users. But the downside of dropping the lens when - and it is only a matter of when, not if the tripod collar inadvertently separates - makes Canon's weight reduction option just stupid!
Geez Canon makes you hold down this button while turning that one to get anything done with a Mark II but this they let the tripod collar separate from the lens with no safety at all! So is there something that can be done?