Warmtoast, am suprised to note that they have the extended exhaust stack, we needed that for cabin heat in Canada, I also flew some in the Southern part of the World which had the short pipe and no cabin heat, mind you the drill was to block the students heat vent with bog paper, thus pushing all the warm air back to the instructors cockpit, some of those poor students from warmer climes must have frozen on a long cross country, but they all seemed to be none the worse for it on graduation day.