all black retzuos
Someone told me that Rav Vozner in NY (I'm not sure if it was Rav BZ Vozner or Rav Vozner from the Mishmeres STaM) that he said they were "karov lepasul". Can anyone confirm this and explain it? While I'm aware some don't like it because we don't have a mesorah for it (It's easy to make yet we never did) I'm not aware of any reason that it would be pasul. In addition, Rav MS Klein himself (Rav Shmuel Vozner's close talmid) holds its mehudar, in addition to Rav Friedlander, Rav Shternuch (the Edah) and Rav Landau and Rav Friedlander told me that Rav Elyashiv didn't have an issue with it (in order to ensure kosher/lechatchila retzuos).