Very little...
Added back rest and rack
Played with and continue to play with several variations of silencers.
Added a Harley clutch cable boot
Fabricated and installed chrome bungee anchors
Changed several tyres, brakes, oil, filters, and a few light bulbs.
The AI remains in tact w/ nearly 20,000 miles - primarily as proof of my hypothesis that "Bad wrenching and uncontrolled experimentation are the primary causes for bluing."