This problem is not really like
“How to find the center of the circle.”
When a shape is drawn, it keeps all the features to connect to handles and when you hover, many handles appear. That I know.
I went to 3D WareHouse and found pipes.
Once I move to copy them and they are out of their frame,
when I double click on it, every items that constitute the shape are separated.
Some side of the circle (cylinders) are larger than others so it is pretty hard to select an endpoint that is exactly at 180 degrees on the other side of the circle.
When I select the whole shape (which is a group) I can see the cubic form around the shape but it is a group, so I cannot select something that I can trust as to be exactly at the center of the circle.
I will try to leave you a picture.
Because, even if I deleted all other 20 pipes size, the file keeps saving at 38Mb.
Even for a single 6inch pipe.
So I need you guys to find a way because it is not the first time that I have that problem.