For the steel arm I made inserts the same width as the inside of the swingarm out of 16mm diameter alloy bar, drilled and tapped 8mm right the way through
then drilled both sides of the swingarm so that I could use a domed head bolt on the inside of the arm to secure the insert and then bolted on a 8mm paddock stand bobbin from the outside.
Might seem like over kill to Neil's method, but I thought I'd do the job properly
If its a Alloy arm the photo I put up years ago are anout on the site one of which is here
http://www.ducatisportingclub.com/sh...ad.php?t=76878