+1 to that. My parents had a sliding glass door put in their bedroom and they chose to have the opening unfinished for some reason. I happened to come by and g

+1 to that. My parents had a sliding glass door put in their bedroom and they chose to have the opening unfinished for some reason. I happened to come by and got to show them how to match up the edges because the original home builders were apparently opposed to having straight walls, took like 20 minutes and saved them some money. Learned this stuff when I was living with my father as a teenager and he was doing general construction projects (badly).