The only thing I have changes is a few blocks:
Mainsheet, upgraded from Ronstan 6:1 to a Harken Carbo 7:1.
I changed the location of my mast rotation cleats, but I am not very happy with their current location. I am planing a new setup.
I changed my rudder kickup system. The initial kickup system on the blade was a true PITA once it kicked up. I can now release the leeward rudder from the windward hull without moving too much. Its a sweet setup, but expensive.
I also changed the front jib block location. I moved it further aft because at first the line would get caught on the spin pole making it hard to slack or release the jib sheets.
I also removed the self tacker block and now I just have an eye mounted perdendicular to the spin pole.
I added foot straps, they are mounted as far aft as posible as well.
I did have chicken lines for a while, but the setup was not very efficient. I want to install another system, but that is further down the road.

I have done quite a few changes, but nothing substantial. Mostly things that will acomodate my type of sailing.

Future changes are:
Spin retrieval setup. Tom, I would be interested to see how you do yours.
Self centering steering.
Increased purchase on mast rotation line. I also want it to where I can control it from the back of the boat and not from the front.