Hi Joe,
I am also a relatively new Nonsuch sailor, having owned my boat for just a few years. Here are some tips that I have learned and ideas provided to me by the collective body of Nonsuch folks.
Our sail is huge and it is designed to be reefed. In some circumstances reefing can improve your point of sail and your speed. Nonsuch sail best at less than 20 degrees of heel. While you can sail a Nonsuch with full sail in over 20 knots of wind you will have more control and comfort sailing with a reef in, and you will still be going at hull speed and be able to point higher.
Nonsuch are great down wind sailors. Try sailing on light air with the boom tip in front of the mast. It feels odd at first and requires close attention to wind direction. But it is very efficient and quite a hoot.
Do not tighten the choker so tight that the sail curls at the bottom. This is bad for the sail as it stretches the foot.
The more you sail your Nonsuch the more adept you will get a sailing it well.
Randy Gadikian
Paisley Moon, NS 26c #37
Buffalo, New York