Glad it's working out!
Just a heads up, I don't want to make you worry, but...
One of my broodies was a great Mamma until the chicks were 3 1/2 weeks. All of a sudden, one night she did not want to stay with the chicks, and went to roost with the others. Next day, the chicks started to follow her, and she turned against them, caught one by the neck, almost killed the poor thing! I had to intervene and put her on a rabbit cage for a while!
Crazy chickens... Usually they stay longer with the chicks, but each one is different!