R&G hugger and rad guard for me, but the hugger alone doesn't stop the crap covering the rear shocker.
Some have fitted sock tubes. I myself added a flap made from plygene which is fastened upright from the front of the hugger reaching just under the frame.
Not a bit of crap hits the shocker now.
A duck tail of sorts will also keep the rear seat and pillion drier and cleaner, as the ct is notorious for decorating the rear end from the tyre.
Just don't ask Hartley (Paul) or was it Scotsy ? As to the best method to fix one on.