With that, the drawers are hung.
There’s a bit of misalignment in the middle column of cabinets. It was weird, because I had basically set the bottom cabinet, then set the middle on top of that, marked it, then the top on top of that, marked it, etc. Everything seemed fine when it was just one or two, but when putting them all on, we have this.
All told, the biggest change I’d make is to use smaller boards along the back. I had some 8ft long that were 1ft wide (I think). I could have cut the board in half and been fine. I still have another board, so there’s that. I’ll probably try and line up my mounting screws with math instead of marking from the cabinet.