I just discovered that my sewer hose from my camper makes a perfect steam "box". I fasten the unbent outwhales amidships. I extend the sewer hose over the outwhale from the end. Hook up the steam. Stuff a rag in the open end. fire it up. When steam starts coming out the far end check the time. As it gets ready I start installing screws working toward the end. The hose is slid back accordian-like as I go. The outwhales took the bend just fine.