Have you checked out the Worm Wig Wam? https://wormwigwam.com/ Or you could go with a large scale DIY like in: https://www.youtube.com/watch?v=JyDdGPCM6s4 after 25 min. into it.

Sounds like you feed the worms an overwhelming amout of flour & flour product which generally are fed with caution. You might want to p/u waste/pulp from a juice bar to mix into your bakery waste. Just curious, why only 1/6 of your egg shells. I would keep all of it and use the residual heat of your oven to dry them for easy and safe storage. Heating makes them brittle and easier to grind into powder.

Too much grain products usually make the bin sour and high risk for protein poisoming. How many worms/bathtub (estimated)?

Thanks for the video. I have not seen that one in months.

I know the issue of of protean poisoning, but luckily have not had any issues with it yet. I have been careful about how much flower I feed them. I have ordered a 55 cubic foot drum composter and from what I have read partially composting everything first helps.

I do dry all my egg shells. I have been giving about 1/3 of them to the lady that I get part of my farm eggs from. I have been saving the rest. I still end up with a lot of store bought eggs.

I have no way of telling the populating of the tubs. I know the last on I added only has about 3 pounds in it.