I have an AF 1140 --- 2010 model and have absolutely NO quality issues. We have taken it some 20 + K miles spring,summer and fall and just love it. The only thing I have had to repair/replace is an LED tail light unit. The AF is built like a tank. If there has been a downgrade in recent quality that would be sad. So if anyone can cite such downgrades please do so with specifics. I recall viewing their factory video back when I was shopping for a TC and saw some 40 workers climb on the roof so structure is no issue. I remember somehow that the roof is some 3.5 inches thick. Not sure about the sidewalls. Happy Trails