Jon,
Like that seat arrangement and the shocks. Bet that stiffened up the rear end. Which leads me back to the question I asked earlier. If you have stiffened up the rear shock mounts for the twin shocks setup, you have already resolved much of the supposed advantages of the mono shock setup - bar the swing arm itself? I.e. you have rid yourself of the flexy subframe. If I were you, I would look to a second frame to mess around with for the proposed mono conversion. This current one looks pretty damn fine to me!
You could use an aluminium blade fender at the back and have it hug the wheel closely, mounted from the swingarm, like a modern hugger or an old BMW racer. leave it bare or paint it. A small blade type fender for the front would not go amiss either...
This is talking from a UK perspective - wettest June since records began - and still raining!
Of course if you can get away with it, with no fenders at all and it does not rain much - why the hell not?
How about some badges for the tanks.....Leave the Harley riders in no doubt what you have.
Finally - paint. Do not paint too much of the bike the same colour.......frame and tank in one colour is enough.....if you do the wheels the same colour it might well be too much. Keep the wheels in a contrasting colour and do not paint the engine, unless you can guarrantee to do it very well indeed - and then not in the same colour as the rest of the bike. Keeping the wheels silver might still be your best bet, unless you can get them wires and then it won't matter.
My humble oppinion only. I am very jelous...

Keep on hacking
Steve H