I had my trailer repaired last year. It began when I noticed the back of the garage had dry rot. It was caused because during assembly of my trailer, the tech forgot to apply a sealant on the outside trim of the trailer. The fiberglass is two pieces, seamed together by this strip that allowed water into mine. While the repair center had it apart, they noticed my frame had a 4 inch crack right behind of the third axle. I had them do the frame mod as well and total, it cost me $5500. The frame mod actually fixed a lot of my panels and cabinets that were once bowed and had gaps. Now my trailer feels solid and in the five years of owning it, that's all that has happened to it. I own a 2008 3905SLC.