Trimming out a new house, owner wants box beams. This is my first time building them. Pics are from the master bedroom after priming and show my process. The two long beams are 1x nailed on the flat since they’re up high, the 4 running to them are mitered joints. Basically it took longer than I expected and there are quite a few more to do in the house. Anyone have a quick process or tips for these?