Hello cadbob, Thanks for your reply. We use "Camduct" to develop our flanges (CID 215) for nesting, this pattern allows full control of all dimensions and has all options including bolt holes. If I use a flange from another service for the model it will be of no use when I send the file to Camduct for nesting and it wont help with the BOM neither. The Z-master items folder in Cadmep has this particular flange but it cannot be fixed to a model using the Attacher function. Is there a way you know of to add the pattern (CID 215) to an existing service so I can use it as a connector? I'm confused as to why Autodesk hasn't done this already as it's a common practice connector method in HVAC Dust Extraction. Regards.