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 :)

(I asked Eli first before posting this who gave the okay.) For parnassah I work part time by a Software development company here in Israel. Most notably we created the PowerSefer ( www.powersefer.com ) app for smartphones, tablets, PC and Mac. We have worked on many other apps for the Torah/Frum world as well as for the secular world. The preference is always to find ways to make apps and software for frum people but it's a business so we must be willing to branch out. An idea came to mind recently that I would like to get some feedback on from those that work in STaM to see if it would be of any use. As it is now I know the software used to check STaM via a computer is quite expensive. I'm sure not every person who works in STaM (b'frat in Chutz L'Aretz) or would be checking STaM on a regular basis (perhaps a shliach or a rov in a remote area of the world) would have access to this software. My idea is to create an App for smartphones and tablets that could check...