A lot of packing tape and an iPhone :P I have extended my links to the max mikeR recommended and I am in pretty good shape now. You can't see where it hits the body in the vid. Check mikes thread here I have a bunch of pics in there and my rumblings lol. Check the top of your sway and you will see some marks/paint chips if your banging hard, connect the dots to the body. You can see right above the red mark on the sway in one of my pics.

Basically if the link is too long you are going to hit the body first, too short and you get the grinding action. Les and a couple others ground the body seam down to give the bar some extra movement space. I may still do that but I am pretty close to satisfied at this point.