I mean it when I say you shouldn't push yourself. ... whatever reason you think he's trying to hold you back for, Ucchii always has everyone's best interests at heart. He'll know when it's right to have you move forward.
[Souji holds up one hand for emphasis.]
Right before I got here, I spent weeks training myself to copy a technique I admired from my mentor. I nearly ruined my wrist in the process. As long as you so Ucchii you're determined and keep working hard, he'll trust you to move forward. The last thing he would want would be for you to hurt yourself because of him. If anything happens with you trying to copy his technique, he'll only blame himself.