Take a club-length dowel and place a metal ring ( eg. curtain rail ring, large annular body-piercing ring

etc) over it. Go to the top of your backswing so that the ring rests on your hands. Make your downswing movement and mark / video the spot on the ground where the ring falls off.
It seems to a beginner like me that a weak, early release causes ring to slide off early in downswing and land outside my right ( right handed) foot. A max delay snap release causes ring to slide onto, or even in front of, the ball.
Easy to do indoors.
I know that this is really just a version of many commercial products ( eg "swingsetter" by Leadbetter / "Power release" by rover golf ) but it is cheaper and gives a visual marker of the release point where the other products rely on auditory markers.
It is hard to document auditory markers in an objective way for reference over time but a visual marker can be captured on video, or on the ground, much more easily and compared with future/past results.
It is also another use for the dowels!!
Is this a useful image or am i cultivating a motion that will lead to disaster when i actually hit a ball?
Thanks for any comments