What is the point of the rowing excercise? Although I can understand the idea of hip stability, why would you pull your hands in a straight line directly back to your hips (which would surely bring an attacker directly into you). Pretty much everything I do in aikido I have my hands in front of my centre, but generally extending away from my body.
Also, why are there two different versions (one where you just push your arms forward, another where you swing them forwards). Is there any benefit of tori fune over e.g. just extending forwards or back (or eight directions)??