Re: changing helm style
I think it may have been a factory option. A friend has an ODay 25 with a wheel. It uses a Teleflex cable to push/pull the rudder back and forth, similar to power boat steering. The wheel and engine controls are on a pedestal and it has a Zephyr sail drive.
The setup works well enough, but as others have pointed out, it will be a pricey upgrade.
'88 C&C 30 MKII