Aart, you know me. If I had a serial soft shell layer she would not be around long. I'm surprised you are keeping her but i don't know your motivations. It's not always that easy to figure out which one it is though, I can appreciate that. I can also see your frustration if you are getting a lot of broken eggs. I don't have many broken eggs. When I do, clean-up is usually just grabbing the top part of my "hay" and tossing that in the compost. As long as I keep enough "hay" in the nests they don't scratch to the bottom, maybe the longer fibers has something to do with that. If I don't keep tossing fresh stuff in there it does get shredded to the point they can reach the bottom. Even then I hardly ever get cracked eggs let alone broken ones. My conclusion was that I don't see any functional advantage of wire bottomed nests the way I use them. I also don't see any functional disadvantage the way I use them. In my opinion this is like many other things on here that people have different opinions about as they strive for the "best". In some unique situations one way may be "best" for them, but for many of us there is no real best. There are just different ways to achieve outstanding results.