Well i have been sailing my Reynolds 21 now for 3 years now.. I have to say i am so glad i picked this boat! I have bout new sails for her last year this year i did a mod to my transom, i do believe i gain 2 knots! smile below is my fix

https://plus.google.com/u/0/113618646846617070054/posts

Reynolds 21 #38/39

https://www.youtube.com/watch?v=l9aVtzgXVHs