Did you used standard or IMR 14500 batts?
TX!
Great little pocket cannon! IMR batterry?
dont own a IMR except for a 18650
!4500 is a regular Trustfire Grey 14500 ...
Might try for some beams ...
http://makeagif.com/i/el42JF Larger View :
High Medium Low , on AA ....
The pictures dont show it but , its soo nice ..
Low mode is almost perfect for a walk around light , medium is very nice , and high , well its high , especially for a AA ...
I put in a 14500 , and took it outside , and Bling !!!
Medium is bright , low is low , and high is just so much power !
I took pictures but once again the camera just can show off high in my back yard , the light bouncing back really afects it bad [ yeah that much light ] ..
You guys really want a AA - 14500 XM-L , or a RCR123A + XM-L , so much output in a small package is just freaky ..
Medium 14500 [ around 300Lumen ]
WOW!
Thats insane! Didnt some of the F20s have a problem handling 14500 batteries with the stock emitter? Do you think the 1.92 amps your drawing now on a 14500 is limited by the battery or the driver?
Hey Don, since UK is being overly prohibitive for carrying pocket knives did you perhaps wanted to have at least a pocket flame thrower? :D
Does anyone know how much lux is needed to burn a paper with a "flashlight"?
LC Torana @ CPF has a mag mod that can flame a Pizza Box [ yeah - set it alight ]
1.9A I would say Battery , the best RCR123A's can do 2A , so I would expect the 14500 to be about the same .
+ I really dont know about the driver , the 14500 seems to top out about the same as the AA around 1.9A [ so could be the driver ] ??
This particular driver never had problems with 14500 , though the light did come with another driver that apparently did have issues ..[ DX ]
This F20 originally came from lightake ..
x2 
I have never modded a light but would really like to try it out. Did you replace the bare emitter or put in a new emitter that was on a star? If so what size star does that take? I watched those videos on youtube about swapping emitters on a board using a stove and i KNOW id screw that up.
XM-L is on a 14mm base ...
Mine come from Cutter electronics ...
Thanks
Oh yeah, I know I do. Thanks, old! :-)
I'm a little surprised there aren't more people trying to cash in on the XM-L hype. It seems like it should be fairly easy and lucrative to fill this niche by offering what amounts to a pocket rocket in a generic body. I know people in the firearm business who started out that way (mostly holster makers; and making holsters is similar to modding flashlights in that it looks easy but requires a fair amount of expertise and experience to do well) and eventually turned their side-business into a full-time job.
Nice mod there, Old4570. I wish I knew what driver comes in those...I could use a bunch.
Hi everyone...
Nice mod and thanks for the beam shots, old4570...also do you know why your Akoray AK16 didn't like the XG-P R5?
Could be current , or heat ... Either one would affect putting in a XM-L [ Other people have moded the Akoray with XP-G R5 just fine - mine on the other hand ]
Damn im not good at all on DIY….Too bad for modding 
Not to ressurrect an old thread, but I just picked up a F20, for the life of me I have no idea how to get to the emitter to do the mod. Any one have any suggestions?
The pill is screwed in. If you want to remove the star that is glued, then remove the driver, mount the pill in a table vise (emitter on top), heat the bottom of the pill with butane torch and twist the star with thin pliers 
I recommend using copper PCB and potting the pill a bit. There is enough space between the driver and baseplate which is quite thin.