Concerning the original pirtzah of the ten amos, there is a clear letter from maran R’ elyshiv zatzla to r’ Betzalel Rakow of gateshead, where he described Grach no’eh shiurim as having been the standard minhag both lekula and lechumra. It’s printed in koivets teshuvois t. 30, and some nored people hang it up in e”y every now and again.
