While setting my post for the drive way gate 2x2x108". everything was squared up to 90 deg with the digital level, when I went back to check the next day, it's off by 1 or 2 degree so the top most of the post vs the bottom is about 1/4 or 1/8 inch off. What special tricks did you guys use to ensure it is level and plumb exactly 90 deg?
Now that would have me all screwed up. The post on the building is tight at the top. The post at the wall, the chain link fence is throwing a curve to it making it look crooked. To me it looks like you have the top spread out a couple of inches more than the base. 



The odd thing, the next day at work, he asked me where I got my plumb bob at.