Thanks, yeah, that's similar to what I'm looking for, except that appears to be for 26" and up, and I need 20", but the same concept. The other thing that concerns me is that it doesn't look like it has any adjustability in the mounting. My rear triangle is a little fatter than some, so I'm hoping to find one that's not perfectly molded to a standard rear triangle. Pletscher has one that look like it might fit the bill, the Pletscher REAR Multi ZOOM. I'll probably be trying one of them out, soon.