Re: hiriki no yosei/elbow power #1
It's nice to reply to a fellow Yoshinkaners. Wrt to footwork, Hiriki, tainoHenko or Shumatsu, it doesn't matter if you stay on your balls of your feet or use heels and balls of foot, the end result should be the feet gripping the floor/mat. That's what I learned from my sensei anyway. With gripping, it confers stability and power.
My two unworthy cents anyway,