ok, here we go as per other thread, had a look behind the JH600 sprocket cover and applied the "chinese fix" with a smear of epoxy between the swingarm and chain-slider this evening and will keep an eye on the chain slider in the future. let's see how the "chinese fix" works as a weld on the swingarm runs right underneath the chain slider.
changed the low quality nylon nuts to stainless steel domed nuts inside the TF alloy panniers while waiting for the epoxy to dry.