Got a report from a friend the nylon pouch's listed here: https://www.banggood.com/Outdoor-Camping-Hiking-Bag-Water-Bottle-Bag-Kettle-Pouch-p-993966.html?rmmds=myorder&cur_warehouse=CN
will melt the nylon top and burn thru the tie string with a Q8 on max or close to it, sitting in the pouch tail down. Something I didn't think about really - maybe this nylon doesn't hold up well to decent amounts of heat, which of course the Q8 can produce?
When he got the Q8, I showed him the lock-out methods, told him about storing it locked out, but he forgot once. He had it in his car, noticed smoke. He said it was just a minute or two - not sure if it can happen that quick - maybe? He thinks he accidentallt switch on the light when putting it in the pouch. I got the melted pouch, it's a black one. There's not a lot of damage - just melted spots on the upper material that holds the draw string, then there's the draw string which melted enough to break it on both sides.
When I use these, I always store the Q8 head down in it - not sure if that would help, but sure would be nice to know a pouch is non-flammable.
I gave him one of the army surplus smoke grenade pouch's from wrabiitsurplus (eBay) to keep - I'd think it would hold up better to heat, but doubt he's gonna do that again.
Also got in one of these today: https://www.ebay.com/itm/T3-Gear-Single-1-Smoke-Grenade-Pouch-Coyote-Tan. Little pricey at $12 shipped but fits the Q8 perfectly, sits pretty deep - maybe 1/2 the tail cap sticks out of the pocket, so pretty deep.
Also got this one on order: https://www.ebay.com/itm/900-pcs-of-Blackhawk-BH-37CL14CT-smoke-grenade-pouch-in-coyote-tan. Cheaper at $8 shipped, and appears to be a good size based on the dollar bill comparison, but haven't gotten it yet.