Re: Embedded Chain plate maint/replacement
The quickest and easiest way to create the landing you need is to wrap the chains in packing tape, put a thick bed of thickened epoxy down where they will mount and put the chains in place.
Clean up the squeeze out and wait for the epoxy to kick. Then remove the chains, peel off the packing tape and you're ready to remount them.
I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.