Frame, sub-frame and various components powder coated;
Acerbis hand guards (£20 from DirtBikeBitz, rather than £50 from Touratech);
Nuts and bolts replaced with a stainless kit (mostly Motobins, although it wasn't a complete set);
Downpipes and silencer replaced with a Keihan stainless set;
Fork seals replaced;
Push-rod seals replaced, and stainless steel tubes added;
Tank, mudguards and side panels repainted (fairing removed);
Headlight replaced with twin lights;
Instruments replaced with an Acewell digital system;
Timing chain replaced;
Pistons and heads de-coked;
1 exhaust valve replaced;
Alternator, diode board, regulator, hall sensor all replaced with improved versions ("police spec" from Motorworks);
Touratech single seat;
New side panels (from Boxxerparts).
The starter motor was also replaced recently with one of the "improved" Valeo starters.
The Acewell is indeed ace. It's connected into the speedo drive output on the gearbox using a cable from Boxxerparts
One problem - the side panels are fiberglass copies. The man who did the painting said that it's difficult for them to get a perfect and lasting finish on fiberglass surfaces. The material also dents very easily.