No, is there a link to that?
I bought two bins. The plan was that when I think (how do you tell?) there's enough worm castings in the bottom bin, I would drill a bunch of holes in the bottom of the second bin, put fresh bedding, food, leaves in the new one, set it right down on top of the leaves in the old one. Quit putting food in the bottom one and assume after awhile the worms will migrate into the new one.
Assuming that works and most of the worms migrate into the new bin, doesn't that leave you with a bunch of leaves and old soggy clumped up bedding in the old bin, with hopefully some worm castings mixed in?
In the meantime, I have discovered that along with onion skins and tops, my worms don't seem to like bread very much. There's a chunk of bread, now all moldy, that's been in there a long time, that I may just pull back out. But there was a post here somewhere (that I'm not going to look for right now) that listed things worms like and it included avocado shells. Since we had a big discussion here of how avocado shells don't break down in the compost pile, I tested a piece in the worm bin. As near as I can tell, it disappeared quite rapidly. So yay! My worms can have all the avocado shells they want, since my compost pile doesn't like them!
So here's a reason to have both a worm bin and a regular compost pile -- compost pile for the bread and onions, worm bin for the avocado shells! Anyway the worm bin is nice to have now in mid-winter, for the worm tea for my seedlings, since my compost pile is still frozen solid.