Listen To The Shver

One of the three לאוין  we learn from לא תתגודדו  is

שלא תעשו אגודות אגודות   (min Hatorah)

R. Shmuel Birenbaum zt”l writes, when he came the first time to his Shver (R. Akiva Eiger zt”l) on Chol Hamoed Pesach. His Shver insisted, he put on Tefillin*, even though, his family was from Chasidic background, and didn’t wear Tefillin on Chol Hamoed.

Reb Akiva Eiger said that in Germany & the surrounding countries it was accepted to follow Toras Moshe- The Rema, in all his Pesakim where he argues with the Bais Yosef.

*from then on he wore Tefillin on Chol Hamoed ,

  with no Bracha and made a Tenai