I met Ian when he was apprenticing under Brion in 2018. I found him to be very friendly and helpful chap. Ian also oversaw the re-rigging of our very good friend’s 2002 Island Packet 350 the following year. She was very pleased with the outcome.
Years ago in my previous life, the shipyard maties used to load test all the onboard cranes and lifting devices on a regular basis. It was not my part ship so I didn’t pay much attention to the process. But I wouldn’t be surprised if there isn’t some simple non destructive testing that can be done to prove the chain plates. I have also experienced x-ray and ultrasound testing as John has spoke of but that may not be feasible for a recreational vessel.
Again good luck and keep us abreast of your progress