No problem! You will be amazed at how bright that little light is with a 10440. Just don't run it for too long on high or you won't be impressed with no light coming out of it 
I have done the review, but excuse me because English is not my natal language. I used google translate.
in this moment I am correcting errors and bad photo links!
EDIT: some translating error corrected, but the photo links cant be repeared...
However, the original link is here:
http://www.forolinternas.com/viewtopic.php?f=5&t=762
You can click in the photos to size up in that link
Thanks for your review fran82, makes me want that itp even more. :)
Btw I think you had some bad luck with your F23, mine is almost as bright as some R5s I have while drawing only 0,8A (10440). I'm quite sure I got a real Q5/R2.
I have 2 F23, and both are less bright than the A3. OR maybe, my A3 is a exceptional and unique unit that produces more light than other A3´s
Both of my F23 draw 1,2A on HIGH on 10440, then decreasing down to 0,7A continuos. With Ni-Mh draws 1,3A.
Ah, the F23 LED is really a Q3, not a R2
As I said, not on mine. Maybe it's a typical case of 'later badge gets inferior emitter'. I ordered mine the first days it landed on DX.
Mines are from January and February respectively
AH!!!
I forgot to say that the manufacturer of the F23 offers this light with different emitters and different drivers:
Emitters: From xpe Q3 to xpg R5
Drivers: from single mode, 3 mode, to 5 mode
Also in ALL online shops that sells the F23, claims Q3 LED except DX, which claims R2 and is not
KD has a Trustfire F23, a AAA with a Q3
DX does not seem to have this light. They have a F22, which is a AA R2
Could you give us a link phlowcus?
http://www.dealextreme.com/details.dx/sku.24291
I was planning on modding mine with an xp-e q5 warmwhite anyways, if that makes it brighter it was indeed a q3. :)
Oh, they call it EF23.
Did I hear you say its a Q3 or not a R2?
I think it was a plain and clear sentence, I didn't use any irony or metaphers if that helps.
EDIT: Erm, wait. Maybe it wasn't too clear after all: I have not done this test yet. Sorry Nautic.
You can't tell from just looking it at whether it's Q3 or R2 or whatever. You need to measure efficacy which is not easy.
All of you know about the web site of DrJones? DrJones is a member of DX forums. He has measurements of many DX flashlights.
He compared the F23 with the Tank TK703. The TK703 claims Q3 LED and has same brightness of the F23. So F23 has Q3 LED
He compared the F23 with the Tank TK703. The TK703 claims Q3 LED and has same brightness of the F23. So F23 has Q3 LED
That's not how it works. Brightness on these cheap lights is going to be more a function of the driver (of greatly varying quality), and the current it provides.
To measure efficacy you need an integrating sphere and reasonably precise current/v (power) measurements.
To reiterate: you cannot tell which emitter bin because they look EXACTLY the same.
Ey guys.... I have corrected the photo links
Can be seen the photos now? If you cant see them please tell me!
Yes it works.
Thanks. The photos are there and works. But sorry for the bad quality, I have not digital camera. They was taken with my mobile phone
Thank you for the nice review 
Great review fran! 
This wasn't about precisely binning/ranking an emitter. We were trying to find out whether an led is rather a ~q3 or ~r2. This is totally possible, especially with the mentioned emitter swap. Why do flashlights keep getting visibly(!) brighter in the last years and months without the need for an integrating sphere?
OK, returning to DrJones "methodology" of testing. He has not yet an integrating sphere, it has another "invent"...
If he test F23 with 10440 and he gets, lets say, 150 units of ceiling bounce and 1,8 units of spot intensity
and then
he tests tank 703 with 10440 and he gets, 140 units of ceiling bounce and 1,6 units of spot intensity...
It seems that both flashlights has same LED, because with 10440 both of them goes Direct Drive. The only differences are the reflector........