I have in fact heard of Rav Mendelovich. I’m not sure if you knew this, but Rav Nesanel Quinn (one of the first talmidim in the yeshivah) his mother started the nursery & kindergarten which grew into Torah Vodaas. And Fun Fact: Rav Quinn’s family was a Lubavitcher family sent by the Rebbe Rashab because they didn’t have children in Europe he said ‘Meshane makom meshane mazal’ (Change your place and your luck will change for the good). Travel to America and there you will have children.”
I’m not sure you knew that.
And it is a known fact, that bachurim from chaim berlin and torah vodaas would come to farbrengens often. I don’t know if you were of that age, so maybe you don’t remember because it didn’t happen to you.