Runtimes are misleading. I doubt you'll get 90 mins from 1500 lms. Not without a huge step down. Potted electronics, and tailcap switch I'd like more info.Bouncing in and back out, passing this along for those that are interested.
They do have potted heads, they even pot their Rein switches and @ $200 these will be a steal.
For now I'm sticking with Malkoff