I just fitted a Remus to my 1200 last week, and felt the number plate and left rear indicator was to hot, so in typical a bodge fashion, i tried to work out how to prevent a melt down.
All i done was add a thick washer to the inside of the bracket, that mounts to the footrest hanger. This seems to of moved the can further from the bike, looking at it from the rear. All seems to be a little cooler now. This should be ok as long as you don't use panniers.
I found if you loosen the clamp at the bottom of the connector first, it will leave everything lose enough to put in the washer, and do up the top bolt on the hanger. ( the bolt isn't really all that long so dont try anything to thick )
I cant guarantee this is a perfect solution, but its cheap and easily undone if your not happy.
I have also noticed the latest Remus cans have a longer "spout" an the end of the can, to prevent the panniers, and i assume from other posts, the left indicator / number plate, from melting.