The mitziyus (That we went back and forth on.) is irrelevant to Rav Moshe’s psak on Brooklyn. I don’t know what you see here. Why would 2.5M be different than almost 3M? And my point was that Rav Dovid knew this claim and wasn’t fazed by it. He thought 2.5M to be accurate. Why didn’t anyone convince Rav Dovid of this?
I expect that in a number of years the claim will be that Rav Dovid was also mislead. I know personally that he knew that Rv Moshe wasn’t misled.