Dear friends, I've been reading the forum for a while now and I finally convinced myself to purchase an ALTA to upgrade my current setup. Everything looks amazing, but I'm still worried about ALTA's performances in high winds and extreme altitudes. I will use it mainly in wind up to 15/20m/s (40/45mph) and at altitudes up to 4'000 meters (13'000ft). I will mainly fly Canon 5DS and RED. Reading online I found different opinions about high wind performances and most don't get great flying with 20mph winds. What would happen with almost double the wind speed? Haven't found much infos about high altitude flying and payloads also, someone has done some tests? Thanks everyone for the useful informations!