Hogan said something about a belt looping around the elbows in an articule titled "Learning Good Golf by Sense"...and nowadays we have many arm connection type training aids.
I also want to have a device that can make the swing became so easy to learn and perform...I will try one as per your design this week and feel it.
Thanks for your insight.
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If you cannot take the shoulder down the clubshaft plane, you must take along some other path and add compensations - now, instead of one motion to remember, you wind up with at least two!