As an image, never think of your right wrist as rolling - only driving the heel of your right hand DOWNplane. Leave the 'feel' of the roll to the left forearm - until after the ball is gone, after both arms straight. If you are using angled hinge, you shouldn't really feel the 'roll' however - just the thrust.
If you 'thrust' the heel of the right hand and 'roll' the left, you will feel what 'swivel' is. See my posts in the drills section for some additional images that will help you get the proper feels - keeping the right wrist back, and the left arm roll - through to both arms straight.
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"Support the On Plane Swinging Force in Balance"
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Simplicity buffs, see 5-0, 1-L, 2-0 A and B 10-2-B, 4-D, 6B-1D, 6-B-3-0-1, 6-C-1, 6-E-2