What is your swing speed? Are you swinging the whippier shafted driver at the same speed? What 'flex' is your stiff shaft and now the flexible shaft? Do you know the frequency of each shaft?
not sure what my swing speed is now. Swinging at the sae speed. Flex is S (tour stiff is more boardy i think), the flexible shaft is also S. Dunno about the frequency. Basically it's the same shaft diamana kai'li 65, one is from D3 910 the other one is from R11. The r11 is definitely more stiffer, which I like more. I feel like the whippier club would not catch up.
Do you think you are 'going normal' in the same position for the flexible shaft as you are with your stiffer shaft? What do you 'feel' is happening to your arms and hands at final release going into impact?
I don't have a different swing, every swing is the same.