I have bored out the narrow window in the bezel and used an A19 reflector from the Sandwich Shoppe. It gives a great beam with a Cree XR-E and nice form factor. Not a very hard mod. The front view is not shown but is essentially all reflector and in situ o-ring (smaller than the o-ring shown further down that thread).http://www.candlepowerforums.com/vb/showthread.php?t=166807