Thanks for that Jim, as I didn't mean for you to get on the roof. I can't get on the roof to measure as I am in Florida and if it don't stop raining soon, I will have to bag the A/C mod and try to get pontoons on the 5er someway.
My rig brochure says 12'8". So if I deduct the 4" for the front vent as it is removed, I am now at 12'4", and then add 11 3/8", even 12", I am at 13'4". So I need to measure but based on your 11 3/8 I have somewhere around 2 to 2 5/8 inches before I get to the 13' 6" drop dead number.
Thanks again....