I'm not sure if you just need them to move or want to keep them on all the time. Here is the way I make mine and I have moved with them as well as leave them on all the time.
I just make a frame the size of the box, install 1/8 mech screen, trim off the excess then put a 1/8 strip of masonite (you can use wood) over the frame on the screen side. I cut 4 (one on each side) 2 inch vent slots approx 1/8 deep on the non-screen side. The vents allow air in between the top but are to shallow to allow the bees in. This will also allow you to see your bees without removng a inner cover. When I move them I put duck tape across the screens to hold them in place. I make my frames 5/8 them add the screen and strip. I hope this helps
What\'s smarter than a talking Parrot-----A spelling bee