It should be noted that Rav Moshe’s Teshuvah was about relying on a manager of the company, where the information was given meant for a Choleh not Kasharus, and there was liability (it may not be that not all these were criteria for the Heter).
In the new Rav Moshe book it brings that he told Rav Avrohom Blumenkrantz he can/should pasken even “SHVEREH” Shailos,( ???? ???? ??? ??? look up Rabbi Blumenkrantz in the index).
On the other hand Rav Belsky has told a Talmid to do the opposite of whatever it says in the Pesach Book.
I’d apreciate anyone w more info.