Are you trying to ID in the turner or in the Hatching tray....I am busy trying to work out how to position all the eggs on turners so that they will go into baskets to hatch and they will be easy to distinguish. I have Black Australorps, Orpingtons, Andalusians, Jerseys and Copper Marrans. I will put RIR and barred rocks in the turners with them, then leg band all the black chicks.
Ah the logistical ponderings of a crazy chicken man............
In the hatching tray you could cut cardboard the hieight of the walls and put it in like a W which would make four or five compartments. Very little space removed. Then use binder clips to fasten on id tags for whats in the space. You could also use binder clips to change the shape of the W if need be.
Just a thought.
deb