Former President of the OU.
I (Rafi Hecht) asked Rabbi Bain one Shabbos:
How was he inspired to take it on? He answered that Rabbi Hershel Schachter make a compelling argument to start wearing it. He asked his Rabbi, Yaakov Weinberg if he should start wearing it and was told yes.
Why Raavad and 7-8-11-13 with no Chulyos? Because Rabbi Weinberg told him to. He was advised not to change his tying minhag at all.
How many years has he been wearing it so far? 25 years.