I made a makeshift tube smoker for cold smoking. Couldn't afford an Amaze-n tube smoker, but mine's the same basic idea. It's roughly 2" in diameter and 11" long. My questions are: 1. How hot can I run my smoker (mini WSM) and still use this to generate smoke? I'd like to use it for a turkey smoke at 325˚-350˚ but wasn't sure if it would ignite or anything. I just really like the quality of smoke it produces. I'd be placing it either on the lower rack or directly on the diffuser, which is the steamer insert that came with the pot. I normally just put it in the bottom of the smokey Joe on the coal rack. 2. I have been running my vents wide open and I've gotten between 3 and 4 hours of smoke. On the last smoke, it lasted just a hair over 3 hours. I'm wondering if I can close one of the vents to slow the burn? Not terribly important, as I can just reload, but I was curious.