We don't cleat the spin sheets--that's my job.
You have to work it as you go. Keep the very slight curl in the edge. Now we do use blocks that help hold some drag for heavier air days. Depending on your size you probably won't want to fly it in really heavy air days. We only weigh 265 together and have to carry wt. to race. (295 is min) Also, if you are light weight becareful if you flip the boat you may have problems righting it. We can't.
The 20 is a great boat! But we have decided to try and sell it and my skippers 17 and get a boat that fits our needs better. I will miss it when it does sell.
If you guys were closer (we are in Chattanooga TN) or want to get away- I would highly recommend coming down to lake Hartwell, GA for Spring Fever. (twinhulls.com) It is a very well attended cat regatta over Easter wkend. Three days of racing, fun, food, and learning a lot. There are all kinds of great people that could help you learn a lot. If we still have the 20 we will be racing it.
Sorry I'm so long winded-hope it helps and have a great new year. Keep me posted how it goes and if you have any other questions. (firstname.lastname@example.org