Right now the blasted thing is sitting 2 feet from me and is totally stuck. I know it will come loose again but man that is annoying. It is a massive heat sink type pill though, probably 50 grams of brass in that one so it might take a while...
Have any of you had this happen too?
Break out the blowtorch! 
by itself after a few minutes more of waiting. Dang that brass lump HOT!
But now I at least have my first QTC infinite variable tailcap installed and working. Now the testing begins. Since so many here have reported of poor results and also poor life of the QTC pill itself there is gonna be alot of testing before I try this for other mods.
But it is very cool to have a infinite varible light without driver losses though.
As to how cool? It took me 12 minutes to write this because I seem to have no will to do anything else then sit and turn the tailcap from moon mode to fill blast like a maniac. Gotta go....
Your iron is weak.
after 4.5 hours try it again.
Or try a propane torch to get it warmed up.
Is this serious?
You probably have it done by now...
I use a gas welding torch to solder on heavy brass.
or if you know there is enough clearance between your iron and the pill, file away or use a blade and just cut away between them. Be VERY careful with a blade, but sometimes it might just be enough to allow you to pry it apart if the bridge of solder isn't too thick.
Ohh a QTC pill, do let us know how your testing turns out. And perhaps some updates along the way if your doing Lonngg term testing.
I heard any twisting is bad for its life. Squashing between plates that allow zero twisting seems the way to go but I haven't tried QTC myself yet.
Don't forget to eat between playing with your QTC light! Can't finish any tests if one starves.
Pics or it didn't happen! :)
We need detailed pics on how you made it. What light did you do it with?
Oh dear = More Power .. Just wondering what Watt ratting is on that soldering iron ...
+ Never done that ...
Well the QTC build is already showing some minor issues.
The "jumping" of light levels that so many others reported about I experiencing already.
The light is a Ultrafire KH-T60 with a press fit brass pill (the aforementioned 55 gram lump that cooled the iron so much it got stuck right after i applied the solder) that is directly driven off a trustfire "3000 mAh" that seems to test out at a respectable 2600 mAh according to HJK.
It has been sitting on my night stand in ultra low mode for the night. Cool stuff to wake up and with night adapted eyes still only see the faintest circle of light on the ceiling.
The current design is one that incorporates 2 QTC pills but that stuff is strange.
When measuring the resistance of 1 pill that is not squeezed I meassyre ~39 Mohm. When putting 2 on top of each other that are not squeezed i still measure ~39 Mohm. And 3 and 4 and 5 and so on....
Not really what you would expect when all your experience is made with normal resistors. In short there is no further adjustablility to be gained through stacking these things. My tests reveal that the resistance drop across them are the same if i squeeze 1 of them 0,05 mm (drop to around 28 Mohm) which is about a 5/110 part of their full thickness as it is when I stack 3 on top of eacht other and squeeze them a 0,05 mm which is about a 5/330 part of their thickness. Strange stuff this quantum physics.
As for the design it is a copper tube with a press fit plastic sleeve inside, sitting on a post soldered to the negative contact of the switch. It uses 2 small brass discs as press bearings to prevent tvisting of the material. When pressed more the copper tube connects to the base contact plate and the light is direct drive. Tuning the distances for correct fundtion was a b**ch!
And now - breakfast!