Hey alextb1995,

Thanks for asking this question. I have been struggling with this issue myself. I have tried the flat handpalm slap per hsnoeckx, but I have trouble getting back to my chord plucking position. I guess I need to mess around with both techniques a bit more to figure out which will be my "go to." For what it's worth, I've had some success with my 1st, 2nd, and 3rd fingers if I focus on keeping them close together (i.e., touching) and then slapping on the fleshier parts of these fingertips (i.e., lower than where you would fret a chord if it were on your fretting hand) as I come down. Good luck!