I feel bad, I'm definitely requesting way more than I should. I appreciate you being so nice and accommodating. Really impressed with your 3d model.
My design idea for is something like the bad drawing attached. That's your design with another small tray underneath. The tree would be planted over a wide mesh of some sort to allow the roots to go through and drop down to the lower layer. The lower tray would not need to be attached to the upper part, and the lower layer would have a thin layer of soil and drainage holes to allow the roots that drop down and moss to grow. I could drill the drainage holes myself. I will give you the exact measurements I would need the upper part to be later tonight. Also - the red color for the lower layer is just so it is visible. I don't actually want it red.
Thanks! And if this is not possible, I completely understand. I just had this design idea, and didn't think it would be possible anytime soon.