When the weather is bad I move into the GH. I use a shelf extension with a pull out basket attached holding a container to catch the potting soil that I miss getting into the pot. When it's not needed it is pushed back under the main shelf.
You almost look TOO organized! And I'm one of those who has to have everything in it's place. Great idea... save soil... and less clean up.
Now that's something I could do with here. I get fed up having to sweep up all the soil I spill when transplanting or potting up. I wonder if my husband could make something similar for me.
I used closet organizer shelves and made modifications for the pull out shelves. I will post how I did it soon.