I did attend the U.S Sailboat Show this year - as usual somewhat late in getting around to posting on it.
How deep is your rudder? Probably not deep enough when looking at the rudders to these three performance dinghies exhibited at the show.
Rudder for the MX-Next
Rudder for the RS Aero.
And the winner for the deepest, narrowest rudder goes to the Zim 15.