My 2009 BH 3400RE has a design flaw, as my UDC and storage unit is one door opening horizontally, and hits the knobs of the propane door, so it is almost impossible to put a door clasp on the side of the rig to hold it open when desired. Those silver door knobs are too large so you end getting smacked on the rear during windy days. My only fix is to replace the silver knobs with smaller ones, so that a simple clasp works to keep the UDC/storage unit door open. I was told by Heartland, they don't put clasps on slideouts. Suggested that I get the same large kind of clasp that holds open the door to the rig. Unsightly, but works I was told.