The key to not turtling, though, is to seal the mast. Back in the day (like 6 years ago), I had a Hobie 16 that had met a power line in a storm. The line burnt a hole in the mast, maybe a 1.5 inches in diameter. Everytime the boat would flip, we'd have to get on the righting line immediately, or the boat would turtle in no time because the mast would fill up with water. I sold the boat shortly after, so no longer my problem. Anyway, I have an I-20, and the mast is sealed, and it takes it awhile to turtle. I can also solo-right the boat. I have a hobie-bob sitting around, but I'm never gonna use it...it just looks so amateur. I understand if you are a beginner that you need the peace of mind it provides, but once you've learned to right the boat even if turtled, then you've got it.