Hi, I'm progressing from intermediate footstraps to advanced footstraps on my 2008 Rio S. I'm completely self taught and noticed that the tuning tips on the web site mentioned upgrading the fin from the 40cm Drake shallow. I picked up a G10 54cm race fin(deep tuttle) cos it was the closest I could find to the recommended Drake fin. It's arriving tomorrow. My question is do I use this new fin with all my sails? I have a 6.0 freeride, 6.6 freeride and NEW 7.6 freerace sail(yet to use). Or do I keep using the 40cm fin with the 6.0? I know I'll figure it out in time but was wondering if you could give me a heads up!!