Excellent initiative! That FAQ answers most or all of my questions regarding extra battery mods. Speaking for myself, I would really appreciate such FAQs and condenced info on other topics as well. It is almost impossible to sort out the good info from the not so good / useless info in a thread of 30-50-100+ pages.
Like yesterday and this morning, when I was flying in chilly Norway, 8 degC and 3DegC (46/37F), I got a warning about malfunction of the ultrasonic system a few minutes into the flight. I could continue the flight as usual. My first thought was the low temperature. I am sure I will find the answer once I search the forum. Btw, I was filming the same mountain as in this movie