I think Dave misunderstood you or maybe I am. You have two objects A and B. You want to subtract A from B. Where A is the pipe and B is the cube. This is a boolean difference operation. Select B then A then do boolean>difference.
howto-basic polygon boolean operations.mp4 - YouTube
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675
Last edited by ctbram; 09-12-2011 at 10:08 AM.