Classic Coastal Fireplace Mantel Woodworking Plan

Cut list is a bit vague but that might be me.

Generally good plans but could use a bit more detail and photos

Plans are a little heavy on written instructions and could use a few more illustrations. For example, on page 11 it states "the middle stiles are 2 separate parts so seasonal wood movement won’t separate the joints." I don't understand how they could be anything but 2 separate parts. Maybe I'm missing something here. Also, it would have been helpful to include a bit on the framing and installation of the electric insert as well as the quartz surround.