First I am having problems with ellipses in the profile (please see attachment).
Second I am having problems with ellipses in the cross sections, where the pipe is parallel to the cross section (please see attachment). I would like to make the pipes look like pipes shown in the profile minus the ellipses.
Third I would like to make the pipes clean-up at the structures. We all know that the pipes will not continue to the center of the structure, but stop at the inside wall. Any suggestions on the above issues will be greatly appreciated.