Ok. I made half of a jet in milkshape 3d. The only thing left to do is duplicate it, mirror it, and weld the verticies together. Whenever I mirror it, It works but the new side of the jet is far away from the originaly created one. So, I have to "move" the newside to the old one. In doing so, it does not perfectly match up with the old side so I can not weld the verticies. My original side is somewhat to the right of the z axis so when i mirror it, it mirrors somewhat to the left side of the z axis. If the original side was up against the z axis "from the top view" than when i mirrored it, it should be perfectly alligned. How do i get my original side of the moddel to align with the z axis?