Improving Footstrike Timing With Sumi-Otoshi

can i throw him if i get strong at the right timing (when the advanced foot touches and before the other leg becomes active ) or it must be a light pull at the right timing ❓
When working on developing timing, you should try to be as light as possible. Once you start being strong, you are putting energy into the relationship that your partner can take advantage of. The key is to be strong at the moment your partner can do nothing about it, which is all timing.