Should you just move your thumb up and down for it, or is it alright to move the whole hand? Also, When doing the triplets, I sometimes don't hear the the second note when I do them. I know I played all three but, but it just sounds like I played two notes. Like the root then the octave instead of root root octave. Do the triplets end up sounding better with more practice? or is something wrong with my technique? Thanks in advance!