There seems to be a disconnect between the dealer and the mfg when it comes to warranty work and who covers it. I had to contact Dutchman/Lippert reps to resolve my axle issue in previous posts. We totally love the floor plan of the Komfort 3650 FFL, Infinity also has the same floor plan in the Dutchman model. Komfort was a west coast company bought out by Thor/Dutchman and mkt under the Dutchman brand. Their design was for the colder sections thus the insulation package. The roof is a rubber membrane over the roof structure and has aluminum supports, The floor and wall sections are aluminum also, all bolted to a steel fifth wheel frame. All these units including Komfort are pretty much built the same way with the same options, it just depends on the mfg. Hope this helps