Actually I have two questions. First, are Fiberspar masts compatible with Severne and Neil Pryde sails. Specifically a Severne element 9.5 and a Neil Pryde V8 7.5. Second, I have a 2006 Carve 144. I love it. It was my first board. However, I am thinking of up-grading to a Futura; my question is should I go for a 133 or a 141. I like the volume of a 144 for lite to moderate winds, but I am wondering if there would be advantages to going with a 133 now that I have more experience?