Greenhouse shelves and failure

So I put together some shelves in the greenhouse the other day. I was slightly concerned about committing to destroying some wood for the shelves so I figured out a way to make them without cutting or drilling into wood. So this is what I made, a bunch of boards supported by the greenhouse walls and substructure. 

Compost bin is complete!

Well I spent all last Sunday plus a few nights this week but I finally got the compost bin done.