i realize everyone searches for what works for them, so i'll share what works for me.
its not about timing, rather its about reaction time....i start raising the swing button from above the ding line...after dialing in the power i want, release the mouse button and the green power bar starts racing towards the ding line...i now lower the swing button so that it completely covers the ding line...when the green power bar touches the left most edge of the swing button, i click...this usually gives me a slight pull or a ding, which i of course account for in lining up all of my Ts and approaches.