I happen to be working on one of my rear lights and thought I'd post up what I was talking about in the post above. In the pics below you can see the little hooks that stop the light from just popping off like the SuperFlash do.

https://www.flickr.com/photos/816860...posted-public/

https://www.flickr.com/photos/816860...posted-public/

Man what happen to being able to upload pics to this site? Looks like I won't be posting pics up anymore.