Damoshe – I’ve heard that rav tuvia held that way, too, but he obviously didn’t want it publicized! So don’t publicize it.
It wasn’t just rav moshe; almost every posek in NY assered it.
Funny how some people rely on rav moshe for cholov stam, where he was basically a yochid, but ignore him when it comes to eruvin, in which he was part of the majority.