New guy here. I've had the CFX for about two months, just ran into this thread because I was wondering about the whole convection conduction discussion.
So, I just used my laser thermometer to test the chamber temperature without any vegetation in there. I set the temp to 430, waiting for two minutes. The chamber temp never reached above 115F, hardly much conduction. But, the temperature of the silver collar above the chamber did get to 225F at the front of the unit, but only about 125 at the rear of that same collar. Something must be running up the front of the unit to make that top half hot. But like I said, it was just the front of the top collar, not in the chamber where the vegetation goes. Just saying.
After two months I really like the CFX. I think the taste it gives is phenomenal, battery life great, easy to use, there ins't anything I don't like about it. Except, I go through a lot more vegetation then when I smoked from a bowl. This is my first portable vaporizer, but found the same issue with a balloon vape I had. From what I've read, vaping should conserve matter because combustion actually degrades much of the THC. I can believe that, but I am definitely using more vegetation vaporizing than combusting.