Chris
Nice to see your son is into 3D printing, my son got me interested, there is so much that can be done on the layout if you just think about it.
I don't want to sell anything I create but I will email you.
This is a brewery so those are the large tanks I think you are talking about, I first create a computer model of what I want and then print the parts. Each tank is made up of 3 pieces.
Here are cut away views to see the inside of the computer model. This of course is not a real brew process but only what I wanted to have.