In 2012 UK Sailmakers set out to develop a new brand of C-Scow sail. With the input from veteran C-Scow sailor, John Porter, we spent time evaluating existing sail shapes on the water and in the loft. We used our years of sailmaking knowledge and computer analysis to develop our shapes. We built two full scale test sails to evaluate on the water and on the computer with our accumeasure program. The time and effort paid off with our first sail winning the first two regattas it raced in dominating fashion.