My brother is a mechanical engineer and I was looking for something outside of myself to print. He sent me a file and this is what I came up with.   This was a 4.5 inch test piece just to see how it would come out. It came from an Inventor file and it was designed as a piece of equipment and not a model. So that meant that there are hollows where tubes run in and out of it and the empty space inside where the vessels builds pressure. So, lots of walls and intersections and parts. I als