If you get the chance, grab your cheap Ontario machete, go to the backyard, and take out some weeds. Yes, it's definitely not the same thing as performing tameshigiri with a shinken, but you'll get a few ideas about blade angle (hasuji) by the sound the machete makes when going through a plant, and by the resulting cut. Please exercise a reasonable amount of caution doing this. Might get your backyard cleared up, too...
Let me add a small nit here...I don't believe a groove makes a sword stronger; it'll make a sword stronger in comparison to a blade of the same mass is all. Take two identical swords, groove one, and the one without the groove will be stronger. Anyway, not the most important thing...
Regards,
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