[Avodah] Hallel on Yom Ha'atzmaut

[AES]

My shul hosted a scholar in residence this past shabbos.  One of his
talks was a shiur on the concept of saying hallel on Yom Ha'atzmaut
(with or without a bracha; the propriety of saying al hanisim and
shehechiyanu, etc.).

The shiur was relatively balanced but at the end of the shiur, the rav
stated that those who do not say hallel on Yom Ha'atzmaut would
ultimately have to "give din v'cheshbon" for their actions.

Later, in a different talk, the rav made a personal request from
everyone in the shul - from those of who daven nusach ashkenaz.  He
requested that, in the beracha of T'ka B'shofar of shemona esrei,
instead of saying "v'kab'tseinu yachad m'heirah mei'arba kanfos
haarets", we should add "l'artseinu"

The rav acknowledged that adding "l'artseinu" was nusach sefard but
said that RYBS, who davened nusach ashkenaz, made that one change and
added "l'artseinu" to his shemona esrei.

Question:  Can anyone confirm whether RYBS did in fact say "l'artseinu"?

KT,
Aryeh