I am modifying some standoffs on this model of a telephone receiver. I’ve removed the old ones and untrimmed the holes and now I would like to add the new ones using the inner surface of the phone case as a cutting object.
ideally I do this by using booleanDifference > booleanUnion. This works for the 4 pieces on either side, but not the center two. All objects involved are closed polysurfaces.
I think it must have to do with the fact that the center two standoffs are intersecting with a non planar surface.
What am I missing here?
standoffs to be trimmed
4 out of 6 standoffs trimmed