Ok, interesting. So your saying it's better not to have a top cap " wood" on top of the fence. Gives them something to aim for. Use just wire instead ??
My Wyandotes have not gotten out since I switched from a 40" plastic that they would sit on, to a 48" wire fence. I think the wire is kinda tough on their feet but to my knowledge they have never even tried.
Hens go broody when you don’t want them to… and won’t go broody when you do. 