What is the actual measured height of my high-roof 1500 unladen? I realized earlier I really need to know this (before I screw up). I'm pretty sure its in the forum here somewhere, but I can't find it now. Seems I remember everyone agreeing that the roof clearance is a bit higher than the 99" (8'3") listed in the brochure, etc., and I think someone got up and measured it. Thx.