[ He thinks about if for a moment. ] I don't mind if you use a different sword. As for myself, I have always practiced with the stander-sized one.
If I were the one to wield it, the difference of size would most likely affect my performance [ but not his willingness! ] But if my opponent is the one with a different weapon... [ He simply would have to learn through combat how can he use those differences to his advantage. Easier said than done, though. ]