We "don't know how to use a level" 😂 If I had a dollar for every comment we've gotten telling us we're putting the level in the wrong place, I'd have a lot more dollars than I do now. If you're using irregular timber (or just regular HD lumber, based on how warped that stuff usually is), you need to be using line rule layout. When you use line rule layout, you don't plumb or level based on the corner of the timber. Instead, you plumb that datum line. Want to learn the life changing magic of lin