The "shakedown" cruise for my J30 this past weekend (Marina del Rey to Catalina, 36 nautical miles) revealed that the Spinnaker sheet lines are way too short. What is the optimum length and thickness? Also, I had a J24 owner/racer on the boat with me, and he recommended replacing the spin sheets with Maffioli Swiftcord. He claims that the Swiftcord doesn't kink as easily. Any input on length, gauge, brand would be appreciated.