Welcome to BLF flydiver! You'll love being here! :)
Rinsing is always a good idea, but I wouldn't be too worried. The switch is magnetic and there are no other mechanical parts than the metallic spring and small pellet (which are used to lock the switch to on / off positions). I would add some vaseline to the spring. Those parts will rust anyways, but I bet they'll last quite a long time. The spring is easy to replace if needed, but the pellet is very small.. So small that I lost it already. (Be careful when disassembling! The pellet is shot off as soon as the ring is taken away!) Not sure where to find a replacement..
See photos below.
Magnet side of the switch. Magnet is located in the plastic ring, body has a groove allowing it to move to on & strobe positions:
Hole & spring. Pellet should be on top of the spring.. (note also the notches in the plastic ring):
This light has basically a dreaded hollow pill, see below (reflector & pill assembly opened from middle seam):
The mod would be simply filling the hollow part with copper (or similar). For example couple of suitably sized coins would do. Idea is to have some metal under the emitter star and touching the sides of the pill, allowing the heat to escape from the emitter.
[quote=flydiver]
I did not take the lens off. Is there an O-ring under that? Pictures don't show well there.
[/quote]
Yes. There is a thick O-ring, sitting on a ridge, partially glued in to keep it's position. The lens presses that down so that it will tighten between body, reflector, and lens, sealing the head well. You could apply some silicone when opening the head for modding.
The O-ring can be seen well in this photo:
[quote=flydiver]
Tail stand? It's supposed to be a dive light, at least that's the way I interpret it. It has a retainer loop on the tail that is critical for diving. I don't see that as a con for this light.
[/quote]
I fully agree, but this light is so affordable that it will be bought also by non-diving purposes. So I thought it's good to mention that.. And of course there might be a situation where you come from a dive, go to your cabin, and electricity goes off -> tail standing light would be useful then. ;)