Welcome to the site!
As you might guess, there are not too many owners here with that model, and that's mostly due to a lower number produced, back in the day.
Here is one recent thread started by an owner, and if you click on his name there is a way to send him a private message.
I have been looking at Ericson 41s for a over a year and getting close to pulling the trigger on one. One of my concerns is replacing the chainplates which are fiberglassed into the hull. Has anyone done that job before? I have searched YouTube and the internet but nothing for the Ericson 41...
ericsonyachts.org
Given that the construction of that boat is generally similar to the other Ericson's of the era, many construction/engineering details will be the same.
Opinion: While it's true that Bruce King seldom drew a bad boat, the E-41 remains one of his best classic designs. We visited aboard one at a rendezvous a decade ago, and were hugely impressed. This was a dark green hull, visiting the Rendezvous at Port Townsend, WA.