Istvan and Tommy,
Thank you for getting back to me so quickly. I responded via E-Mail, but for some reason it doesn‘t seem to have made it to the thread here.
I‘ve attempted to snap to anything I can. From the construction plane the only thing I‘m able to snap to are other lines in that lie in the same plane. Even that seems somewhat limited. I tried extruding a rectangular pipe parallel to the circular pipe and drew a line on the pipe-end, lying on the construction plane, and wasn’t able to snap to that either. See image:
I‘ve also noticed that sometimes I can only snap to lines if I‘ve previously snapped to a point on that line. In one instance I‘m only able to snap to the horizontal line (on the construction plane) if I‘ve first snapped to the corner (would upload photo, but there is a one photo limit).
Any idea what’s going on? Are my long pipes leading to numerical instabilities or something? Or have I misunderstood how snapping is supposed to work?