Its interesting how these coincedences happen. I read this thread earlier, then went on to my Saturday night shooting event. A friend showed up and was showing me his new Surefire LED G2 flashlight and his new aftermarket drop in P60 replacement for his 6P. The aftermarket unit was about twice as bright as the SF factory unit but it was intermittent. He had taken the outer spring off so that it wouldn't have that gap you guys have talked about on this forum, and we could here it rattle around inside. Most times it would come on but it was possible to activate it and not have the light come one until we shook it. Now he is hoping he can find the spring. I mentioned if it was too long to not have a gap at the body end of the bezel, to try and trimming it (the spring) down until it fit, or to put an additional sleeve of Tin foil between the side of the pill and the housing to insure a slightly snug fit to complete the negative terminal contact without the spring. It was pretty bright but not as bright as my Fenix T1. It had no markings on it at all. He said it was an aftermarket Cree Q5 that he bought off Ebay for $11 plus shipping.
Not a fan of the SF tactical switch versus the Fenix T1 or the Inova T1, 2, or 3 series. You can never just have it were you don't have to play with it. Either have to tighten it up a little bit for good momentary use or loosen it up so it doesn't turn itself on. I am much happier with the Fenix T1.