I'm trying to draw an object that has a lot of tubes of different heights. Those tubes are all exactly the same, with a hole on one side at the bottom. The holes of all the tubes should be exactly the same, and only the height of the tube change from one to another.
Now, the question, since all the tubes are the same, I'd like to have them linked, so that if, in the future, I'm modifying something on one, it affects the others. But, if I do Alt+D and try to scale the tube, the hole at the bottom gets elongated, which is something I don't want.
So, is there a way to "fix" the size of the hole, and having the scale change the height of the tube, without deforming the hole.
EDIT: To make it a bit clearer, a very important point is that I want a linked-copy of the tubes. I want that if I change something in the tube, for example the shape of the hole, this change affects all the tubes. The only difference that the tubes will have will be their height (above the hole).