John Williams had a timely post about dagger boards today.

I think you are asking way to much from the under 12 crowd to operate boards and to much from the run of the mill home builder to build a hull with a well.
The rudder lock down needs to work very easy and not require much strength.

Phil: The designs are great. I continue to wonder in the microwave world of the USA how many people will take on such a project.

My vote would be # 2