My main concern was if the rear floorboards would interfere with my leg room when stopped. Road some yesterday and they are completely out of the way when coming to a landing.
They were mounted on my triumph as front floorboards. I had to grind a little to get the hole to line up with the guzzi bolt.
Between the topcase and seat is a trampoline spring covered with pipe insulation. I would prefer not to use the topcase, but the original backrest seems to be designed more for style than function.