Hybrid Worm Bin-Harvester "Vermi Tumbler"
Here's an experimental prototype in use I call the Vermi Tumbler, just started a few weeks ago with about 1,000 red wigglers. From my blog article http://gourmetbugs.blogspot.com/2012/02 ... mbler.html
So far it's going well, at least the worms are doing their thing. I won't know for sure how well it works until time to rotate the bin. The concept is to be able to remove castings, cocoons and aerate the bedding without having to remove the entire bin contents. Still need to install the finer mesh sifter under the unit for final sifting of the castings from larger particles and cocoons.