I have a reclight mini pineapple that's awesome right now but it might lose its edc place due to loose threads. How well does Teflon tape hold up on a twisty? I would think poorly? Right now I'm waiting for some slightly larger o rings from AE to see it that will do the trick.
teflon works, although I think an O ring swap is the better option
imo, flashlight heads ride mostly on the O ring, not the metal threads, so as the Oring ages and gets looser, or if it is not a tight enough fit, the head can wobble on the threads.
you can observe this by removing the O ring. The threads are not close tolerance. the head will have play in it, in all directions, push pull press, etc.. that is why twisties can be pressed to turn on, if not untwisted enough
I hope you find a good O ring for you pineapple