If you look at your button mapping image you will notice your are specify a specific button code when the program see a bend. Your square bend is using the generic bend button code. What you need to do is create a button code on the square bend item that is unique like you have for the radius elbow. Then create a new line item in the button mapping that is mapped to the new code.
Nathan Chapman
Production Manager at General Heating and Air Conditioning
Revit Architecture Certified Professional
Revit MEP Mechanical Certified Professional
Revit MEP Electrical Certified Professional
DynaFabrication Package Author
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