Nice flow-thru bin Mike. Way to use what you have instead of spending a lot of money on worm accommodations.
To Rob -- worm wee is a myth IMO. Moisture in a bin is either water from the food waste or condensation.
So if your bins are too wet for you -- worms breathe through their skin, so like moisture. Reduce food, add bedding or air.
Flow-thrus have air movement through the bin so microbes are happier and in theory the bottom stuff drys and drops.
Doesn't always happen but it isn't a unicorn -- I have seen it!
I've had very good results with flow-thru. I use them to finish off my
compost from my totes.
It gets worked one more time and I don't have to separate worms.