iyhbyu,
first of all, I’m just curious about your use of @. Why do you use it before the screen name?
As far as CY is concerned, we’re probably arguing semantics, but the bottom line is as I noted earlier, that all else being equal, it’s better to use CY, even for someone who is not interested in “chumras”. You haven’t addressed the later teshuva (the one reprinted in R’ Forst’s sefer) which makes this point clear.
As far as eiruvin, of course there are eiruvin which are 100% mutar l’chatchila (there are some around even today, i.e. in bungalow colonies); I was addressing the “local eiruv” mentioned by Oomis, which I took to mean our common neighborhood eiruvin.