Hey 6,
I flew my Nexstar earlier this month in 0F conditions. Worked like a champ, except for the front ski came loose and caught on landing. The engine, now that it is tuned for the cold will start pretty well for me now. After I have run it once that day, I can usually flip start it again after I have come in for refueling. It actually works better that way, because the electric starter barely has the torque to flip it over at that temp.
Have fun and enjoy the new hardware. Oh, and if you don't have one yet, pick up one of these... http://www.rcmitt.com/
Curtis