Which Horachamon is recited on Rosh Hashanah during bentching: what the Previous Rebbe said to the Rebbe about this custom, and how the Rebbe himself would say it, together with what other Horachamon prayers are said on Rosh Hashanah.
How to recite Oseh Shalom during Aseres Yemei Teshuvah, specifically the difference in wording when saying it during bentching. The Rebbe would say this particular Horachamon out loud. Additionally, we say "Horachamon Hu Yanchileinu Leyom Shekulo Tov" as part of bentching.
During Aseres Yemei Teshuvah, in bentching, we use "Oseh Shalom" instead of "Hashalom." These details reflect the unique customs for these days as practiced by the Rebbeim.
Summary
The special additions and precise wording for Horachamon and Oseh Shalom in bentching on Rosh Hashanah and Aseres Yemei Teshuvah, following the customs of our Rebbeim.
What הרחמן do we say on ראש השנה?
What did the Friederiker say to the Rebbe?
How did the Rebbe himself say it?
What other הרחמן do we say on ראש השנה?
How do we say עשה שלום during עשרת ימי תשובה?
How do we say it during bentching?
The Rebbe would say this horachamon out loud
In addition we say the "horachamon hu yanchileinu leyom shkulo tov"
In the bentching during aseres yemei teshuvah we would say "oisah Shalom" not "Hashalom".