You did a bang up job there going to steal you feeder been fighting forever trying to get one that works and does not waster the feed upright pvc or laying down
I will add more photos soon. It turned onto a spring/summer project so it's still a work in progress tweaking and adding to what we have. We're revamping the run with a roof as well as sand. My young girls ate the grass much quicker than I expected and with rain and lack of grass it's been hard to keep the run dry. I put hay down to help dry it out so we can have sand hauled in.
For ventilation we installed the white metal wire lined vents from lowes to allow ventilation while keeping the rain out during the cold months. We have one on each side of the house, but will be adding a 2nd to the front side.