Those tank mounts look nice but are kinda big, especially the 33# horizontal mounts. If you can easily make them fit your 20# tank, I might be able to do something similar for a 10# tank - it's 9" in dia. It wouldn't take much to create the whole thing from some flat stock but I'd like to have a slick latch that will securely hold the tank and be easy to remove the tank for use.
'03 KTM 450EXC
"If you know what you're doing, then you aren't learning anything." - A. Lincoln