5axes

??? Yes the tabs are defined as Custom Support. And Basically they are more Custom Adhesion element. But in Cura we don't have the possibility to define a Custom Adhesion...

Modification which works : **if (True in [l.Closed for l in fp.faces[0][0].Shape.getElement(fp.faces[0][1][0]).Edges] and len(fp.faces[0][0].Shape.getElement(fp.faces[0][1][0]).Vertexes) == 2) : fp.circumferenceBool = True else: fp.circumferenceBool = False** https://github.com/5axes/FreeCAD-GDT

Yes it's a fork ... but I don't think I have the Python and FreeCad knowledges to support this WB. As FreeCad-GD&T is more a POC than a real useable...

No I think it's always better to leave the link to the original source. Even if I think to continue to work on this project if someone is interested in...

https://github.com/FreeCAD/DevelopersHandbook/blob/master/roadmap/index.md#objective--seamless-extensibility Establish standards for addons to meet to achieve a ‘recommended’ or ‘featured’ status. Featured Addons should - Have an engaged maintainer -> _Don't be sure to be an engaged...

> So perhaps you can go in to what GD&T does right now ? For the moment it's just a Proof Of Concept. There is the possibility to create some...

Agree with you : unmaintained and not functionnal

I don't have any issue .. But the part you mention in your link doesn't looks like teh part in your image. 

3MF file can keep sometimes a transformation (scale and rotation) and when you apply the tab creation on this model you keep also this original orientation and Scale. Solution :...

Automatic placement are always on the border of the dark shape. as this area is calculated by Cura , I cannot do anything on this issue.