My SS and other Ti turned up this weekend. I like both versions of this light but theTi ones have an issue, there just isn't enough thread on the head. I have less than a single turn between turning off and the head passing the o-ring and getting all lose and wobbly and ready to fall off. Not too much of an issue for me as I don't plan on carrying them on a keyring but at that rate even in your pocket it will work lose as the head is fairly easy to turn. They should have made them the same as the S/steel version which has 2.5 turns before the head passes the o-ring.
My top tip is ( and I do this on nearly all my twisty lights ), lube the threads with motorcyclechain lube and leave it undone for a bit. Motorbike chain lube is thinned with an evaporating agent and after 10mins or so thickens up into a very viscous lube that makes the head of the light very smooth to turn and feels like you are turning against a resistance force. The difference feels a bit like waving your arm through the air then underwater. It is still easy to do but there is a resistance making the action smoother and takes more effort. It's this thickness that stops the lube flying off the bike chain when it whips round the sprocket at 100mph. It's also safe for o-rings as motorcycle chains all have o-rings between the links.
