Yes, springs on both ends.
didnt really understand from intl outdoor site how to change from 3-mode-group to 5-mode group. how should i do it?
and is it normal that modes go in this order: med, high, low?
This thread explains mode changes.
My mode sequence was H-M-L.
Mine is L-M-H
You are referring to the new version - it uses a different driver, allowing the user to change modes via the UI with no need for soldering. Choice is just 2 modes now, but can be switched on the fly. Haven't done it myself, but what they are saying is switch the light to low, turn it off. When turned on, it will come up in low mode, then in 3 secs it will blink once - very quickly then turn it off then on -- this should change modes. If you don't see the 3 sec blink, you probably have the older EDC driver which is soldered in place.
It means it will blink every single time if I leave in low mode 
And if I turn it off then, it will go in to strobe mode. Aaaarrrrggg, I hate this. Why canāt they leave a good three mode with memory alone? If they wanted to add the strobe, make it so that it will be almost impossible to accidentally enter in to it e.g. fast click 6 times in 2 seconds or something like that before switching in to strobe mode.
I was so close to buying this
Even though mine had the old 105c driver, I changed it to the KD V2 driver. Mine is set up L-M-H-L-M-H-strobe-SOS with no memory. And it has memory or no memory option. I am thinking about buying another one and will just buy the host and build it like I want.
sontakke - Think the mode changing isn't that easy to do - the split second it blinks, you have to turn it off/on quickly.
allan d - Agree, I should have bought mine as just a host/parts
Tom, you are right, there are nearly as many driver preferences as there are members here.
Trying to find the tint bin that I like combined with a driver that I like is too frustrating. Iām just going to build my own in the future.
Allan
Thatās right about changing from 3 to 5 mode, it doesnāt switch quite that easily. Took me a few tries to get 5 mode, then a few tries again back to 3 mode. It takes 3 quick on/off or something to switch. Dunno, was glad it went back to 3 mode, and itāll likely stay there. The off/on flash in low mode is a bit surprising/annoying every time, might take getting used to.
I only have 5-6 different lights, this one Iāve had only a week or so, but itās one of my favoritesā¦. size, brightness, floodyā¦
Ideal light to try one of my XM-L2's I got coming in this week! T6 3C tint, but comparible to a U3 in brightness 
(best guess for now).
I still have the classic RexLight V2 which has similar UI and it drove me nuts Take that gratuitous blink out of there please!
UF-2100 has three mode with real memory and no pwm and even though build quality is sub par, I like that light.
I tried my stock XPG outside around freezing or below. It didnāt get even warm after 5-10 min
So perfect during winter for outside.
I bought two of these, one black with XM-L U2, and one gold with XP-G2. Theyāre very nice. However, the XP-G2 one has had some mode and switch issues ever since it arrived.
Sometimes itāll turn on and operate normally. Sometimes itāll blink quickly then turn off, or not turn on at all. Sometimes itāll turn on and flicker at several different brightnesses without being touched. Sometimes on low itāll blink off briefly every second or two. And when changing modes with a half-press, itāll often rotate two or three levels per press, flicker as if shorting, or otherwise behave strangely. It seems like something inside must be cracked or shorting or otherwise damaged.
Any idea if a new switch would help, or is this more likely an issue in some other component?
2. Both of my EDC 18650 lights have PWM on medium and low. However, it flashes so fast I can barely see it. Itās faster than my iTP A3 EOS (final rev), which selfbuilt measured at 2.45 kHz, so Iād guess itās at least 3 kHz. (and yes, I can see that) Itās much much nicer than the common 200 Hz PWM, and most people probably wonāt notice it at all.
4. I added a SolarForce L2 clip to both of mine, and it works great! However, you must add a small spacer in the tailcap to make it contact the non-anodized part of the body. A standard paperclip works pretty well for this, if you can find just the right thickness.
(BTW, the switch/mode issues on one of my units was there before adding a clip; itās not caused by the spacer)
Yeah, it does have 4.5kHz PWM which is so high I count it as no PWM 
It still makes a difference in terms of efficiency and beam tint though, as well as how motion looks. I think the only torch I have with true current-regulated constant output is my Zebralight.
If itās really 4.5 kHz, Iām a little disturbed that I can still see it. That sort of frequency should be heard, not seenā¦
Efficiency is slightly worse, but no tint shift. I can't see any PWM against computer fan. Do you have older driver with stars or newer 3/5 mode? I have old one.
Buy the host kit, fit this driver for xm-l series emitters
http://www.intl-outdoor.com/ld25-26a-35modes-circuit-board-p-414.html
And this driver for xp-g series emitters
http://www.intl-outdoor.com/ld25-2a-35modes-circuit-board-p-415.html
I really really like these drivers for an edc, I have the option of the flashy modes if I need them, it has true memory, and they are current controlled on all levels, since much of my work involves fans and engines, its nice not seeing things strobing in lower modes. Pwm doesnāt bother me, but its still nice to have it eliminated and in this size of host, 2.6a is all you really need going to an xm-l, 2a is overkill on an xp-g but they accept it, and give a nice amount of throw.
Personally, Iād now try to get the 2 series of both xm-l and xp-g, as they are not so expensive and give higher output for the same input, but I donāt believe anyone would be unhappy with the older emitters, tint wise, Iām liking the 4c tint in xp-g and 3c tint in xm-l is acceptable, I still need to try an xm-l 4c.
It should also be noted, fasttech is keeping the convoy series of lights in a huge selection of drive currents and tints. I love intloutdoor, and tend to order there over anywhere else, but fasttechās pricing is hard to ignore.
I have a 3/5 mode XM-L and 3-mode-only XP-G2. The 3/5 mode one is nice, aside from the mandatory blink on low. However, thatās not so bad, and it verifies to me each time that Iām on the level I expected. Itās nice to have the option of flash/SOS without having it in the main sequence when I donāt want it.