We took the rocket up into the Colorado mountains this weekend, and this was our first flight in fairly cold weather. We went up the 13000 too clear the pass, and it got Down to 10 deg F. For a while, and my wife got cold in the back seat. We will fly the rocket more in the winter than summer, so I am wondering what can be done to seal it up a little better. The heater seems to blow out a lot of heat, but it just doesn?t make it to the back seat.