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My "generic" approach for a line of radial holes around the equator of a sphere:
- Revolve a couple of concentric arcs about an axis. This creates the shell of the sphere.
- "Extrude cut" a hole from the center of the axis "through all" the entire sphere.
- Rotary pattern the extrusion about the axis.
A true wiffleball will require a CAD tool with surface topology pattern capability. I don't believe that's Inventor...
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