OMG! The Grip Studs griped on the slippery rocks ornamenting the shoreline of Cuttyhunk Island without compromise! The HDPE cleat kept the Grip Studs vertical whilst supporting my full body weight. But, in order for this setup to work, your feet need to be all the way into the large “boots” of your fins. This will keep your centre of gravity above the cleats, which helps you maintain your balance as you negotiate entry and exit over slippery rocks. The marine epoxy failed to adhere to the HDPE under pressure. It’s a good thing I had the aluminum posts and screws! I have since completely removed the marine expoxy and added two additional aluminum posts and screws to each fin.
When it comes to negotiating a safe entry and exit across a rocky shore line, I trust my Portuguese bottom with field-proven Grip Studs. No screws through soft 1/4″ thick rubber for me!