You may encounter the switch getting hot. It's a common problem with poorly machined and dirty threading. If this happens, clean your threading well. If that doesn't help, polish it.
Honestly? If you can stand to keep it above .7 I highly recommend you get a vapesafe fuse (heck, but 5 they're cheap enough). It's a fuse that will shut everything down if you encounter a hard short, which can sometimes happen, even if you're diligent with your safety measures. I never leave the house without mine. It's compatible with many mechanical devices, but I know for sure it'll fit in a Nemesis, even with the 18650 battery, if you use the small ring. It's marketed as a kick extension on a lot of sites, but it's really not bit enough for that. Seriously, get a fuse. It's a really cheap little piece of mind.