Hello,
I may be wrong but it seems the fin direction of mounting boss is supposed to be based on edge or face.
I am currently testing a case where I don't see how I could orient mounting boss since the surface I am working doesn't offer edge or surface in the direction of the fin.
I have created a construction line going in direction of the supposed fine direction but it seems I can not select it in the property manager of the mounting boss.
Any reason for this ?
SolidworksParts And Features