Been playing around with an Olight i1r 2 that I just got. I really like it overall, but found the head twists a bit too easily. Found an old o-ring laying around,(maybe from the original Fenix E01) and slipped it between the head and body. Adds a good bit of resistance and doesn't feel like the head will spin on its own anymore. 👍🏼 Threw a black one on my keys and this desert tan one will be used for around the house lighting at night.