Hello,Quick question cause I have some rough ideas in my head but wondered what’s the most fool proof way, (taking away laser levels) if keeping two things opposite each other parallel.For example let’s say I have two walls a couple of meters apart - how would I go about fixing a identical pieces of wood either side Exactly parrallel to each other?How would people that built churches and catherderals make sure that the pillars they placed ran perfectly parallel to each other? via /r/DIY http://bit.ly/2XrCPAS
