Just going to throw a few things out there.
First of all, amazing job. I gave thought of making something like this a while back, but I didn't have the time to sit down and do the CAD work.
Second, What is the approximate diameter on the large bowl? I have a very quick little homebrew delta machine which only has a 180mm diameter working volume, so I might have to find someone with a bigger printer for those parts.
Lastly, the chamfer idea is a good suggestion. Not only does it help with the elephant foot problem, it also helps aesthetically.
Now, for my contribution. Provided I can build one, I'll do away with the weights and make it motorized. The idea is somewhat easy, you have a 3d-printed spring wheel with teeth on the outer edge which engage the teeth powered by a DC motor and the hub in the center attached where the counterweight would go. You place a contact switch somewhere along the spring so as it unwinds the DC motor re-winds it.