Yay! Just received my Ti Tool the other day and quite happy with it. Now that I have have them Al/Ti side by side, I can definitely say that while this being my first and likely last Ti flashlight, it's definitely a keeper, a must have :) No way I could do without this one :))
Now..
1st.. STUPID, STUPID XP-L2!. Why ?!? :| Had to go, obviously. Took an XP-L from one of my previous Al Tool AA which got a 219C "sidegrade" and popped it right in place of the awful XP-L2 that it came with. Also, note that the Ti has a copper MCPCB whilst the Al Tool AA's have aluminum ones, which I'm quite happy about. For whatever reason, my tool Ti gets pretty much as hot as my Al ones and quite as fast, although.. I knew Titanium had roughly 10 times less the thermal conductivity of Aluminum.. (?) Both the Ti and Al Tools had an upgrade to AS5 thermal compound, since I've got them open and fiddled with the emitters, so, only difference was the MCPCB'S at this point - with this setup both ran as hot and got there as fast as one another.
The rubber boot on the Ti's tail cap is translucent and thinner so it would let the blue LED's shine through. On the plus side, the boot is now always under the flush level so you can tail stand the Ti every single time, unlike the Al ones, on which the rubber boot always gets bulged around half a mm above the tail cap tabs and always wiggles while tail standing, if tail standing at all if that bulge is even bigger. Downside, while pressing the switch on the Ti, the rubber boot kinda gets squished in a weird way and basically prevents you from preparing down the switch, or at least makes it very difficult.
Tail cap tabs aren't filed on the inside, thus they are sharp and if you have sensitive enough fingers, with lots of presses, you may get discomfort or blistering or even a cut.
I am wondering, if you are using an AA 1.2/1.5V cell, obviously the tail LED's won't light up, but will there still be any parasitic drain still ? If anyone knows, I'd like to know myself. I'm not sure how the diodes are going, if they'll still show a "parasitic" resistance in the circuit while under their Vf junction threshold or whatever is it called..
Gold pocket clip: I know most people hate it, but I think I quite like it. At least it doesn't bother me in the slightest. I may prefer a cyan or some form of blue over the gold one, but I'm definitely not loosing any sleep over it.
The threads are greased, but they are not smooth, not even close by comparison to the Al Tool.
Will probably edit later on if anything else comes to mind.
Cheers!