After dropping a couple of cells to the bottom board of my mating nucs on my first batch of cells I thought I might try these on my next mating nuc day (Sunday). I seem to recall someone (Mike Palmer??) saying that the orange cell protectors were not good for some reason but I forget exactly why. Perhaps the workers can't thin the end down enough and the queen doesn't emerge as predictably as one would like??

Pros and cons?? Or should I just get better about sticking them between the top bars without these??