Same problem. Love to dig into sea and swells which causes a lot of vibration. Bought the Bravo in June 2011, and lots of sailing this summer. Port side A-Frame anchor bolts/screws have come loose three times so far. First time, I tightened the bolts. Second time, I used a couple of drops of Loctite Threadlocker "Blue". Used up package. (Loctite used when boat first assembled -- Small container came with boat). Third time, I coated both bolts with Permatex Threatlocker "Blue" (same as Loctite, which I couldn't find here in Canada). It's held for the last few sails, so we'll see. If that doesn't work, I'm going to "Red". ("Red" is advertized as permanent, "Blue" is advertized as medium strength.) If you use Loctite, suggest you give it some time to cure (see their website on curing times). Another point: My Bravo has two bolts/screws on each side to anchor the A-Frame. They require an Allen Wrench, and a small container of Loctite was included with instructions to use a few drops on each screw during set-up. An older manual on the Hobie website shows Robinson screwdriver screws anchoring the A-Frame with no mention of using Loctite, so appears that A-Frame loosening was a problem, and decision made to strenthen anchoring system. (Could be wrong on this.)
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