We use both. They are pretty much interchangeable. The main difference is the OR 39 by Offshore uses rubber and Amish Outfitters uses hard plastic. We use braid and wrap our line and have not had slippage with either. Amish Outfitters are much cheaper and work just as well. Oh and also one uses a flat adjustment screw and the other a philips. It would be easier to have all of one or the other but with the number we already have it is to costly to replace the OR 39 but we are gradually only adding AO as we replace them. We keep two of each small screw driver in the cockpit to make the needed adjustments.

I would not recommend using a bolt and nut!

We used to use a split ring, barrel swivel, split ring combo that allows the release some distance and independence from the board movements. The release can rotate without tangling the line when it is rough.

We are shifting to a large double snap swivel combo. It is one piece but looks like a snap, swivel, snap combo. It has all the advantage of the snap ring swivel set up but avoids some of the issues with line occasionally working into a ring if it is not tight enough. And is much easier to remove and replace.

We are running the double snap swivels on the Port boards and the older snap ring swivel setup on starboard boards. We just wanted to test them against each other before changing everything. But we will now change everything over to the new system as there has not been any issues.