I have extremely limited space inside the belly pan on my Aurora, so I took a different approach to mounting my pipe. I had a sheet of aluminum at home that I cut. Imagine a "T" shape. At the bottom of the "T" I drilled a hole which the wing rear holddown bolt goes through. The vertical part of the "T" is the width of my pipe channel on the bottom of the wing. The crossbar of the "T" is centered on the widest part of the pipe. I then bent the 2 portions of the crossbar upward, then rolled the edges over. The pipe sits on top of the vertical leg of the T and between the 2 now vertical portions of the crossbar. A simple rubber O-ring from the plumbing department of the local home-repair shop then connects to the 2 rolled flanges of the T. It traps the pipe nicely to the aluminum plate, yet still allows a little movement so you're not breaking the header.

Tim