LOL mark it in your calendar
Yeah you need to give the trail arm/elbow some room to move down and forward on the downswing.
A drill for the spacing of the elbow from the side of the body?
Have you tried this:
Works very well for me.
You've probably seen this drill, right? Just put a tee in that right arm pit so the elbow can come off the side of the body by the upper part of the arm is still "connected".