i have been studying the ST images. from what i read and see, i would guess the areas that make the unit not air/water proof/resistant would be:
1. the area between the circumference of the switch, and the pipe.
2. the 2 vent-holes, which are beveled, from what i read ...
if that is true, would the ST be pretty much water/air tight if i filled these areas with Silicone? i do have real concerns about water (from rain/snow) and condensation (moving from freezing to warm humid areas). i guess the vent holes are there in case of a battery explosion or something (which i am not concerned about), but i figure if that happens, a little piece of Silicone would get blown out of a beveled hole.
also, would it be impossible to get a top-cap (near the atomizer) that is like a hexagon nut? it would be invaluable to me to have a 18650 mod that doesn't roll on a dashboard or other surfaces

i purchased one for my home where i needed a 1/2in water pipe end-cap.
and correct me if this is wrong, but i think you say that dry hands are OK if you use a Metal Drip Tip. that would be great. hands aren't moist in freezing temperatures, which we have 1/2 the year near the Arctic Circle.
thanks ... i feel a little guilty for your extreme customer service. and no, i don't know anyone with a cartomizer for a drip-tip cap. i was thinking i might carve a pencil eraser to make a plug

hehe.