I run with mu tonneau cover all the time and as stated above even in the coldest weather the excellent heater can be angled to keep you warm and a lot of heat is trapped under the cover.
Drove up to Durham passport office yesterday in snow and hail with this arrangement..toast warm in my insulated waterproof suit and full face helmet....just like a 4 wheeled motorbike experience !!!!...wouldn't have it any other way !!!
