I own and am currently rebuilding a 1975/76 Amerigo truck camper with a FULL front (fiberglass) cabover cap. Probably one of the first front caps in the RV industry. I ripped everything out for the remodel and I can tell you there was NOT one ounce of water damage in the entire cabover. Dry as when it was built 40 years ago. I would only hope that the front caps will be as beneficial in todays motorhome and truck camper cabovers. I wouldn't buy an RV taht didn't have the front cap and or the fiberglass roof.
