I NEVER teach a double shift....I DO allow it. Big difference.
You missed one important point, the guy from Louisiana could have made you a better player than the one who wouldn't adapt.
You see, that's IS the debate (and where your former teacher went wrong)
Adjust until it works or not.
Let the IMPERATIVES dictate the components.
Oh yeah, one day I'll show you how to fade it with a flat left wrist finish swivel.
No problem....IF you know how to teach.
The only debate I see is the willingness to follow Homer, his teachings, his reccommendations, and his variations in their purest form with component variations to follow. OR, one can choose to ignore his suggestions.
I have no problem teaching the appropriate finish swivel as explained in the book. It's not my own creation.