There's some pictures on flickr (I don't know how to post them)

http://www.flickr.com/photos/37874328@N04/

The bag is 6 1/2 inch OD, and the pipe was either 7 1/2 or 8 inch inches OD

I cut about a 3 inch strip out of the pipe (to match the opening in the bag, and the slot in the back of the bag was cut to match the bracket.

Having looked at it today, I might put a couple of bolts through the back to fix it (it came off a lot easier than I remembered)

Hope this helps

Cheers

Steve

CHAOS, MAYHEM, DISORDER ................................ my work here is done