“Rav Aiemba’s view has been contested, ”
Not by any eye-witnesses as far as I know. ALL the eyewitnesses said he supported it (Hillel Seidman, R’ Mordechai Glatstein come to mind)
as for the Radziner R’ Shmuel Shlomo Leiner HYD and the Slonimer R’ Shlomo David Yehoshua Weinberg HYD both are mentioned in Esther Farbstein’s book Hidden in Thunder: Perspectives on Faith, Halachah and Leadership during the Holocaust