Try "rotate" instead of "turn". Maybe that will be less confusing. If you rotate the queen excluder (not a wood bound one, but a plastic or metal bound one) 90 degrees then you have a gap for the bees at each end of the frames. (you also have an inch or two of excluder protruding in the other direction) Now it is a "queen discourager". She CAN get through, but more than likely she will not. She usually doesn't spend much time on the end bars and probably won't find her way through. The bees will readily go through this and don't have to squeeze between the bars if they don't want to.