posted on Nov, 30 2014 @ 12:09 PM
I've worked with 3D modelling packages .. you want to create a ring with holes in it?
I would work on a 2D plane first, create a circle, extend the top and bottom vertices on the vertical centerline, spin rotate extrusion them to get
one of the twelve hole segments of the ring, then apply another spin rotate duplication to get all twelves holes. Finally extrude upwards to get a