all you do is by keeping the queen in the catcher is stop her from laying and put the colony behind. You want that open brood nest to keep the colony anchored. they will chew threw that cardboard, and the corrugated cardboard makes a great place for beetles to run to. Keep cardboard outta the hive. Using the excluder underneath lets the queen get to business, and locks her down. I have had zero losses since I started doing this. Yeah the drones cant get out to pee, but its better than them taking off.