Hi guys, I am for some time away from home so I don't have access to my tools. I need to file a square on a shaft and just realized this is harder than it seems. Because I am on a business trip I stay in a temporary rent so I don't want to buy expensive/much equipment for this task. Also going to a shop around here is out of questions, prices in northern europe are out of this world. I am trying to narrow it down to as few tools as possible, I have a file and a vise, cordless drill and some other useful tools for a rent. I was thinking at a sort of jig where I put the shaft at a certain depth so that the portion that will be filed out remains above it. Then I file it until I touch the jig. Then I do it again for the other 3 sides. But I have no idea how I can build that jig or what common parts I can use. Thanks.