The coop is beautiful, but I feel like it needs more ventilation. Your chicken girls are just gorgeous. I love the names. And, I love that you included them in your article.
What a beautiful repurchased brooder! Like others, I believe a brooder plate or mama heating pad would be much better than a heat lamp. Otherwise, I'm impressed.
The pictures were helpful. It was written using pretty simple terms. I think bullet points with how and why, might have made for easier to follow instructions.
It would also be helpful to do a follow up. Anyone reading would like to know how the hatch turned out, and if further adjustments were needed.
Great pictures. Tell us more.
Size/measurements? Cost?
FYI, I'd make an outside apron and get rid of the wire on the bottom, before a chicken injures their foot. I'd also cover the run with 1/2" hardware cloth. The large openings in the wire will allow snakes, weasels, rodents entrance.