This is just a list of stuff I think might be useful to someone else. Some of these changes were made to the boat before I got it. Most of these are simple projects or just interesting information. Here they are in no particular order.
Folding Prop - Martec Slipstream
Motor Lift - Similar to a Garhauer
Intermediate Chainplate Bases - This is important!
Engine Coolant Expansion Tank Relocation - simple and a good idea
Converting to PSS Shaft Seal - Replacing a Volvo with PSS
Binocular Rack - Pretty good storage solution
Short Anchor Roller - This can reduce slip rent
2nd Alternator - More charging power
Windlass Repair - Working on obsolete windlass
Boarding Step Brackets - Toe rail brackets for non ventilated rails
Dual Racor Fuel Filters - Very nice modification for clean engine fuel
LED Lighting - This low power change over from Halogen is easy.
Power Curve - Speed vs fuel consumption for various RPM
Holding Tank Monitor - An external monitoring system called the Gobius4