Nice to see your tray again - it just looks great! And this is what inspired my build. Yesterday, I really thought that foam was an original idea; now I figure out that I had probably read about this in your build thread and stored it somewhere in the deeper layers in my brain.
What I want to try, is to scratch the surface to make it look like a "meal in progress".
However, I just read that floral foam is a very unhealthy material (formaldehyde, etc.). But I think I can find a better material with similar properties.