Your suspicions are correct. My question now remains is it inherently structuraly insufficient or is there a flaw in my procedure?
So....
10-3-D(right arm) always = Picket Fence
Bumpy
I would suspect a flaw in your procedure/execution. I have swung the club with my right arm for years and no pain from the swinging procedure I learned from Tom Tomasello. I swing daily with weighted clubs per Harvey Penick's recommendation too.
As Tom Tomasello has said, all big hitters use their right arm.