So my plans are to add a qlite driver to my uf-2100. Unfortunately, I can’t seem to get the aluminum retaining ring that does over the driver. (I have the 5 mode KD version) Does anyone have any insight on how to get this sucker off?
Thanks.
Wish I could help, but mine came pre-modded by E1320.
I’ll take a look at mine when I get home, if nobody’s given you a hand before then
Have a look at this thread. There are others I believe…search “2100 driver”.
Luckily I got very thin/small screwdrivers and wedged them in. Good luck!
That counts. 
And damn, now I’ve got even more respect for the work E1320 did!