I am not questioning that the technique might or might not work.
recovery from fully developed VRS within 50 feet
I find that impossible to believe. Hawkeye0001, how long were you established in VRS for, and what was your ROD when you initiated the recovery action using this technique?
If your ROD lets say was only a mere 2000fpm in VRS, then a 50 ft recovery would take only 1.5sec, a huge deceleration.
Perhaps your definition of "fully developed VRS" may not be correct? I don't want anyone thinking they can recover from this condition in 50 ft, because in my humble opinion, that isn't possible.