Well, I spent all day Saturday and part of Sunday under my Plus 8 (I have a lift that takes it up 26 inches). After much trial and error I finally fit the panhard rod. Had to modify the aluminium floor under the fuel pump, but it's on nicely and no fouling of the fuel lines. Took it out for a test run, between rain showers, and it feels much more taught when "throwing" it into sharp corners. I also fit new steeting rack boots as the original ones had split. Interestingly on my Plus 8, there is additional channeled steel bolted under the rear chassis bottom rail. I think this is some of the additional chassis strengthening the factory did for the Plus 8. Hence the drilling process to fit the Panhard rod was rather laborious! (8 bolt holes)
