JR 137
Grandmaster
Iām pretty sure weāre on the same page here. I did the kata during a class I took with the founder of our organization (āKaichoā aka Tadashi Nakamura). He told me (in a heavy accent ) āJR back straightā I straightened out completely, then he said ānot that straightā so I rounded my shoulders a little, and I got ājust like that.āMight not be relevant given different style, but hey...
With that move (using my terminology - jump, land in X stance performing low section X fist pressing block) the feet are closer together, the back is straight and the block is about groin height. The 'external' height is controlled by the amount of bend in the legs.
What I found helped most with getting the position was to keep my shoulders rotated back and to keep eye contact with the fabled imaginary opponent.
Stylistic differences, but in the grand scheme of things, theyāre slight differences.
And Iām not sure if you meant it during the jump, but to make it seem like you jumped higher, bend the knees more during the jump.
If you meant on the landing, absolutely. The block gets lower by bending the knees more rather than bending at the waist.