So i've been working a lot on these slap guitar techniques over the past year or so... Tosin has really busted the door down on this sound, i love it. Stuff is a lot of fun to play, too. So far i mostly just use my thumb and some occasional pops from my index finger. I have just started working on incorporating my index and middle fingers in sequence with my thumb, to achieve the Wooten-style "thumb down, thumb up, index, middle" rolls he does. Neat stuff. Anyway, give these a watch and let me know what you think! Thanks!