Hey Kai et al,
The bent-thumb rasgueado position is difficult for me due to an extremely "hooked" thumbnail. Believe me, I've tried to ramp the nail with my nail file, to no avail. I'm not one for artificial nails. Watching Kai on the videos, his thumbnail seems lightly anchored on the sixth string. As much as I try to rest my bent thumb on the sixth string, it just doesn't provide much of an anchor for rasgueados. Any recommendation for those of us afflicted with hook nails? Thanks.
Fred