As a long time HD owner and lover of evo sportys this is a very interesting thread. What if any are your thoughts about protecting the carb from being ripped off when dropping the bike? Having done just that on one of mine it was a show stopper at the time.
With respect to the exhaust have a look what Philth and the boys did with their DRs. These guys do mega miles to very remote places.
It allows you to run full size bags.