Phil nice design. I've looked at the 3 versions each day and number 2 really appeals to me. Can you quantify the difference in performance with the skegs? Can the rudder lockdown be something like the A class pop out rods except extend all the way to lock in near the tiller crossbar? that would mean the kids don't have to go so far back. You've really designed a boat that can be built to suit each location and if you dont need it to fit between another cat, I presume your plans could include a bit more width.
In defense of new boats for kids this discussion has already helped the move from dinghys to cats and in our club Hobies are seen as snobby boats because we cant sail in their regattas. I was looking at a Hobie Tiger and was actively discouraged so I purchased the A class, if I tried to introduce a small hobie the price would be prohibitive and the reception distinctively cool.
regards