I just want to say that Marc has some AWESOME customer service. I received my FW4 last Thursday. All giddy I loaded it up, popped in my 18650, set it to setting 2, and took a hit. Combustion! Ok, so maybe I was drawing a little too light. I tried it with a harder draw. I would still get some sort of combustion or scorching of my load.
Worked with it all weekend, and stayed in communication with Marc. After some lengthy testing, and lots of troubleshooting with Marc, he determined my FW4 needs to be sent back for re-calibration. Whats going on is its literally burning every load regardless of how I draw. We made sure the unit had no temperature offset as well. Seems like its just a hair bit hotter than it needs to be on the 0 offset setting.
Really glad Marc is on top of things like that, and he'll stand behind his product. Can't wait to get it back as I love the form factor and that it uses an 18650. So much easier to keep it fully charged! Now... if the damn thing will quit combusting on me.