I don't know if this topic came up before, but I thought that I would throw out something to help my fellow EC's. When my guys and I trimmed out a house, I made all men carried a level. The plates all had to be level. Nothing worse than seeing plates and light fixtures (Excuse me, Luminers) (I think I spelled that wrong, but I don't care) I used to catch hell from GC's and HO's when the plates were crooked. So I made my guys finish off each 6-32 screw on the plates so the slot was up and down on each screw. This way when the painters took the plates off and screwed them back on all crooked, I could just look at the screws and know that someone took them off after we installed them.