Hi,
I'm a CAD programmer for over 25 years. I created programs for AutoCAD using Autolisp, ARX, VBA and VB .Net. I'm also an ADN (Autodesk Developer Network) member and an ATC (Autodesk Training Center) instructor for AutoCAD (2D and 3D) and Revit.
I can create the plugin you want without problem. The pipe will be created as an extrusion of a circle. Is there any connection between pipes (ex. elbow)?
I'm very professional and reliable so don't hesitate to contact me.
Regards,
André