Can I have your Rollaway Nesting Box Suggestions?

[Lelilamom]

I'm looking for recommendations on rollaway nesting boxes. I have the tried/true metal, 15 box setup and the bottoms are rotting out of each box. The hens often crush the eggs whilst laying in them which leads to many yellow faced hens and not very many eggs collected at the end of each day.

Anyone find a good rollaway nesting box?
Anyone find that they aren't beneficial?

Thanks in advance!