My sentiments entirely, had noisy exhausts for years on my Harley's - in the end you just get fed up with it. They say 'load pipes saves lives', they don't save your hearing though, the ringing in your ears lasts for hours after a few hundred miles .
Could I trouble you further and ask for some measurements please, or even a photo showing the proximity to the mounting brackets. Before I spend £700 on this mod I'm trying to work out if I can make a curved sheet metal shield that would drop from the brackets and wrap under the silencer where the markings are. This way the shield would have to be removed for the markings to be seen, unlikely an MOT tester would do that.