that's a hell of a vertical!
I learned to dunk in 1959 using a paper wad, moved to tennis ball, to an under-inflated volleyball, then to a basketball with stickum. With my simian arm length I could touch 8 feet so only needed a 30" vertical for a solid grunt (not pretty) dunk -- which was illegal even in warmups in 1960... Played city league ball until age 45. Loved playing. Quit when I couldn't hold a 10 point average. Another win for Father time.