Aside from Jazzy Jeff, i learned how to do the transformer scratch by listening to Cash Money..one of the most charismatic dj's to win the championship, and along with Fresh Prince/Jazzy Jeff, and Guru/Premier, one of the pioneering MC-Dj groups.
the now classic DMC routine circa 1988:
..years later Dj Noize would pay tribute to this routine with his own set.
Here's a classic music video from Cash Money & Marvelous:
a rare interview and clip: