Looking for a volunteer.
I was wondering if anyone would like me to mail you one of these lights for free - for disassembly & inspection? It needs to be someone who I trust (long time member). I will send you the one with the loose focus mechanism. You can not only post why the slide mechanism is loose, but update this thread with photos of the pill/circuit PCB - to give us an idea of what type of components they're using. Preferably you need to be someone who has previous experience disassembling flashlights. I only ask that you update this post with your findings. It would also help if you live in the US, to lesson mailing expenses.
Regards, Terry (Portland Oregon burbs)