I thought I could measure racket head speed upto contact.
Using the ping bong ball it looks like i'd be able to make a measurement on this. The swing path is a 3d path and i'd only be able to measure in one axis so I won't get accurate acceleration at different points on the swing path. I can get an average speed thought which will probably be enough.
I'd just like to determine the swing weight I can manage first and then figure out optimum lead placement.