Just when I was thinking it is decided and off I go to look for another boat
To be honest i really like this boat otherwise, she provides a very nice lines - classic but not outdated, and just seems like an excellent balance of many things that is so hard to find in anything reasonably priced.
The chainplate issue is where the balance hangs

Now that you mentioned Albin I am back in doubt.
Do you think it would be possible to achieve a well tuned rig if custom fittings were to be made to connect at least one set of chainplates to the hull? I presume the feasibility and price of such fittings is a question for fiberglass, rather then for rigging specialists?