I have a downloaded part model that I am trying to add a connection point to. It is a stainless tee from mcmaster, and made up of some features including surfaces. Here is the part McMaster-Carr . The problem is that I am able to add a point by manually creating a plane 4 1/8" offset from one of the three reference planes, and then sketch a point on it that is at the center of each outlet. When I go to select this point, or select the plane and then the point, I can't select the point. It just won't let me click on it. Not sure why, or how to add the connection point in?