I now have 3 home made swarm traps! Once a research scientist, always one!
Having removed them (unscrewed them) late afternoon and replaced them mid morning, I now have one with loose pin hinges, so I can remove the outer QE and take out one hinge pin and swing the whole caboodle to one side. the bees soon adapted to it, and those in the trap soon realised they were 'free'. Another has a standard hinge on one side, and a toggle to fix it 'shut' on the other, much more fiddly to make, and perhaps not an advantage.
I think loose pin hinges both sides are best, as then the whole trap can be easily removed and replaced.
I have only put a QE under the brood box when housing a swarm, remove it when comb drawn out and eggs laid. otherwise too many disadvantages.