As far as I see, I can't edit a piping run path in 3d: if I convert it (i.e. 3D poly), it's broken. I can't do an AEC/electrical/convert to piping run on anything but a 2d polyline or polygon, I believe. Am I missing anything? Perhaps there's no value to the piping runs tool, I was assuming it would give me some database info that would be helpful... Have I missed anything?