Nice setup! I just finished my aero tub as well. The cool thing is I found a $50 cab at goodwill.

These pictures are older, before I finished. But you can still see the size of the cab/Rubbermaid containers:




I just finished coating the inside with mylar (i don't have a picture of that yet).

I also went with 3.5" net pots, and pacman sponges.

Does anybody know if pacman sponges are okay to grow seeds in? I'd like to keep the entire process from start to finish in my cabinet. I'll build a humidity dome for the plants first 1-2 weeks.