today i've expanded the section "Disassembly / Troubleshooting." of my review with a few more relevant pix. the reflector of the V2 is glued onto the LED board as before. whoever opens the sealed head (the threads are glued with green stuff!) and then kicks haha against the reflector will tear off the reflector and leave a compromised insulator layer, as before (in V1). I dont expect a better solution in V3 (the manufacturer is aware of my dissatisfaction about their glue); the head will come again sealed (with green glue) which means that the user is not supposed to unscrew the upper head part.
not much force needed. if you ever need to unseal the head (because your Tank "died"), then do it. i have prepared several copies of a circular cut insulator (plastic!!, from a coax) in case i need to (re-)fix the insulation. I am looking forward (honestly!) to installing the plastic insulator in my V3 sample. Once your unit has a plastic or foil insulator, it will never "die" again, promised. It's then really built like a Tank!