Attaching the life buoy on the guardrail?

I will be polite.

There have been hundreds of thousands of life rings mounted on ships very successfully. The mounts look good and they hold the life ring securely yet are easy to use. This is not rocket science and it is not breaking new ground in naval architecture or marine engineering.

This might sound like heresy but go for a dockwalk and look at what other people are using on commercial vessels that have to meet some kind of recognized standard of build or at least function.

Quite frankly, I am appalled at the idea of using any kind of hook and loop fastener in this application. It is really low rent and will fail in very short order after a few weeks in the sun and dirt and salt spray. Take a little pride in workmanship, it will go a lot further than the $50 you are trying to save.

Take a look at this product:

Three Point Ring Buoy Bracket from Taylortec Seahorse

These things are probably made in China anyway.

Actually the company is in Louisiana. Nice looking unit. BTW, I noticed in their ad that they show it with a retrival line. Another worthwhile investment.

Mixed reviews on the retrieval line. Many have a light and/or smoke cannister attached with a short painter. If a retrieval line is attached to the rail the ring and is thrown overboard as a means to mark the location of a MOB, it will drag along behind the boat or foul the screws when the boat turns to (hopefully) recover a very pissed off MOB who watched the ring go zipping by just out of reach at 10 or 15 knots.

Yes, the lines are mainly for rings that you use from land, not moving boats, unless it is a rescue boat.

Yeah, my thinking is that with a large boat you need to mark the spot so you can come back for recovery (most likely by sending someone or some thing into the water once you get back near the location), but with a small boat like this the retrival line gives you a second shot for a bad throw and it's easier/safer to bring the person to the boat than the boat to the person.