Welcome to the forum Bob. Excellent first build. She is a real spartan racer that one. You really need to fit a seat/safety belt and something to stop your feet from hitting the ground when they come off the steering pedals.
These yachts are good for 50 mph+ and if your foot hits the ground at that speed it will end up behind your ear.

Keep us posted with pics and vids when you go sailing.
Lots of help and advice available on this forum. Cheers.