Quiet Land of Erin was a fairly straight-foward amalgamation. Some multi-threads are much more tortuous. While I appreciate that the large archives make demands on Mudcat computer memory, I tbink the emphasis of your work should be on nipping the duplicate and superfluous threads in the bud.
The process for starting a new thread needs to be made slightly more difficult, as it was in past Mudcat incarnations, asking people to try a search first.
And, as I said before, if we alert you to superfluous threads when they are new, you can do your work before much is added to these threads. As you know, even though those of us who remember that there was an earlier thread do put links in older threads, but some people will add to the new thread anyway. (I don't think you need to keep your re-direction message in the new amalgamated Ard Ti [sic] Chuan / Quiet Land of Erin thread! But I am worried about Willa who started the third thread. That thread was completely superfluous, but now she can't even find her name and her interest registered.)