You are most probably right. Carlo was not keen on making new members, although the ones made in early 1976, were made while he was still alive. I guess he had to.
A NY Times article from 1976 that i read said that Carlo was trying to keep the books closed but in his final year when he was really sick he finally relented after being pressured by the other families and agreed to let each of the 5 NYC families make 10 new members.
