[brianmontgomery2000]

Kevin's advice is spot on. Be really careful with bifocals, it can mess up your neck tilt. When doing the drills, take off your glasses, set up in posture and then close eyes, feel the movements in the drill.

Taking my glasses off and closing my eyes are basically the same!

I think that has been part of the set back. I often realize that my should turn has been incomplete because my chin was in the way...all will be fixed in a couple of weeks!