Trevor

Put a lid on it.

Put a three inch length of 1/2 inch wide strap under the fin bolt to make a loop.

My limited experience with Futaba would suggest that they don’t like damp and corrode easily. Expect component failure.

That will go over the heads of most folk!

Inside a coffee jar lid is sometimes a soft plastic disk you can use.

You make them from the Sailsetc item. The bottle parts stays attached to the hull and you screw in the top part when changing rigs.

I got a 100mm lid from Vintage Food Cans on Etsy but I can't find a 95mm one. I searched for food can lids and pot lids and found some 95mm but they were for coffee cups and the like. Vickers could have had some specially made?

Much prefer this layout on my smallish iPhone. Haven’t tried desktop yet.

Sorry but I still use my Isis all the time!

Using Portsmouth Yardstick involves timing everyone’s race and calculating results. Anyway PYNs are applied to whole classes not individual boats. You just gauge your personal performance by your progress up the fleet.

Or curved to fit the bottom of the hull.

👍

If lead was ok you could sand cast one at home using your pattern then file it down to weight. Lead is toxic so health and safety precautions would be needed. By lead sheet from a builders yard for melting down.

Try a couple of turns of string to fill in the gap. Maybe a thin plastic washer?

Just seen the ad for RMG Winches on this forum and wonder which one would be a suitable replacement for the 280D in my ISIS. Any suggestions?