thank you! I think I may try with the 2 drawer set up since that is what I have on hand so it's free. And ok i was wondering if window screen would work. Any other mesh that y'all have used and works?You're beginning to get the general idea. Yes, cut a hole, leaving an inch around the edges, in the top drawer. Glue window screen onto the bottom. It has to be fine mesh or all your worms will fall through, along with the substrate.
Remember my telling you that the beetles will eat the pupae? That's the problem with returning them to the top drawer with the beetles. Your two drawer set-up will be adequate. Read back to yourself my first reply to you. You will be doing one generation at a time in one drawer, while a new generation gets started in the other drawer. You wanted to keep it simple, right?
Just remember to heat treat whatever bedding you choose so you won't have to deal with grain mites. Chick starter is FULL of them.