Thanks for the mention. Why not just lay a 2'x4' or two across the bottom of each mixer box lengthwise? Could even toe them in so they are flush, or use a Kreg job (can borrow mine).

I'm impressed with you literally taking stuff from the fridge and having it grow in there. It makes me miss aquaponics for sure. I wouldn't be surprised if that garlic actually grows bulbs like normal.

Finally, thanks for the mention.