This is good advice. I built ONE swarm trap last year from scrap plywood, and a swarm actually moved in late season, so that's my first spring cutout coming up. It would have been so much better to have them swarm into a hive of mine, so they wouldn't get set back this spring.If you are using eight frame hives you might as well use that. I continue to preach not making special equipment for traps.
Ten frame trap: