We build a fan that has the back of the motor supported by 4, 6 gauge spring steel wire struts with mounting loops on the ends, bent and then heat treated to Rockwell C45-49.5
Drawing attached.
This arrangement was OK with a Roto-molded fan shell but we've moved to an Injection molded fan shell...
We have been fighting import/export issues between CAD programs when trying to collaborate on designs, We use Solidworks 7, Engeneer uses AutoCAD, Manufacturer uses MasterCAM. Once we issue a design as a DXF, not ideal me thinks, for the engineer and the manufacturer, if they make any changes...