The International STa"M Forum

Shulchan Aruch Y"D 271 and Keset Hasofer (13:3) say that a yeriah in a sefer torah must have a minimum of 3 columns. Does this apply to megillos as well? I would think that it doesn't because we do not keep the other minhagim about the dimensions of yerios in a Sefer Torah i.e. 42 lines and the (much denounced in earlier sefarim) vavei ha'amudim. Furthermore, in the 11 line GR"A megillos I've seen, the maximum of eight columns is also ignored. That being said, does anyone have any further sources or psakim on the issue? It would help me to sew a single amud cut from another piece of parchment into the rest of a megillas Esther, but I'm reluctant to do it because I have never seen a precedent. Hope everyone has a good Civil New Year if it affects any of you who are fulltime klei kodesh anyway :)

HaRav Michael Tzadok Elkohen and i visited with R' Friedlander shlit"a at the beis hora'ah in jerusalem today. armed with a bottle of mei klaf, a can of spray klaf, a mezuzah psulah that had been treated with spray klaf and a copy of the ishur for spray klaf from HaRav Yaakov Meir Shtern shlit"a (thank you, R' Alberto). 1. the bottle of spray klaf was presented along with the ishur. it was pointed out by Rav Friedlander first and foremost that the ishur listed on the can of spray klaf (by Rav MOSHE Shtern) is from two different rabbanim (printed ishur provided by R' Alberto in a previous post was given by Rav YAAKOV MEIR Shtern). 2. the mezuzah that had been treated with spray klaf was shown to R' Friedlander along with with a hands-on demonstration of how easily the otiyot were smudged from a simple negiya with a finger (the original tish-tush of otiyot happened simply from rolling the mezuzah). Rav Friedlander and those present were visibly dismayed...