What I mean is that the body of the light seems same as in selfbuilt's pictures. Those pairs of "holes" in the body are under the text "GX25A3" and the big "hole" under the text "Eagletac". What is different is that when screwing the head close the power button stops little left to the text "GX25A3" (instead of "Eagletac"). So when holding the light in my left hand as in one of selfbuilt's pictures I have two holes for my middle and ring fingers where there should be one big hole. But as I mentioned, this isn't a problem as I would carry the light in my left hand most of the time.D6859, I think the logo might be printed randomly in terms of rotational location, so it probably varies from unit to unit.
As for turn distance, my light goes from high (tight) to medium with just a slight loosening turn, but then needs about 120 degrees of turn to reach low. Are you saying that with yours the high to low is just a 30 degree turn? That sounds rather convenient.... or does that give you some problems finding and staying in medium when you want it?
Yes, 30-45 degrees from hi to low. I tried using the light wearing mittens. The grip was actually better, but still I often missed the med when trying to switch to it either having the hi mode flash or end up to low mode. I think i have to check the threads because the head feels stuck when switching from hi/tight to med. There's also a high scratchy sound when turning the light from hi to med. I thought it's one of the pins, but could it be a defect in threading? Maybe it needs lubricant? I can try to take video including the 30 degree turn and the sound when I get back home. But you're right it would be convenient once I get used to it. Also, staying in medium isn't problem because there's friction in the threading, just finding it is.
I can't imagine having trouble keeping the tailcap on. Sounds like perhaps you didn't have it on tight enough to start with. Make sure the tailcap is fully tight before you start... a fair bit tighter than the head will ever be.
I think this happened because the head is so thight and I was holding the tailcap with my littlefinger. Btw, it seems that the tailcap needs to be only a little untightened (not loose yet though, since that would result in turnoff) that the light starts flickering. I thought the tailcap was thight when I laid it on the table. The light started flickering, but twisting the already-tight tailcap fixed it.
Let us know how you make out with further use.
I will. Thank you for your reply and advice!