In the 50 gram/60 gram range, regular flex.
I've been told such an animal doesn't exist but at a driver fitting I won the fitter suggested such???
I'm by no means a fitter but was thinking the higher loft adjustable head with a mid launch/mid spin shaft would work. I see them in low spin but they are all stiff flex. Swing speed of 90 necessitates a regular flex.
Any suggestions?