its not so much the cv....when my front cv binds, it won't break...but when the single u-joint on the axle side binds, it will break (or spit a cap) But yeah, i ground down the chevy yoke as well as the axle yoke.
As for the rear, i haven't ground the chevy u-joint (which i will do). And i use a toyota u-joint on the axle side, and those will operate at a good angle.