I see that the R1T and R1S has a payload capacity of 1,700-1,800 lbs and R1T can tow an incredible 11,000 lbs while the R1S can tow 7,700 lbs. That blows away any mid-size SUV/truck currently available. Those #'s sound great on paper and I have plans to use mine for some towing but I'm concerned about how much reduced range I'll experience from towing. Anyone have a guess how much towing will reduce the range? Also has Rivian mentioned anything about a trailer brake controller?