The less I say the less my foot will go into my mouth! Have to consider reading this stuff in a few years' time after all :-) If tip==personal experience, then I would say I have most trouble making the hip area open up to the sides without moving the legs apart, while keeping the abdomen from being pulled down and forward by that action. If I can keep that from happening, I can sit down and at the same time stretch the back up straight and keep the hip/torso from developing a "kink", and be resistant against a push from the front at the same time. The feet then don't turn out quite as much (they still do) and the heels seem glued to the floor, torso and legs buoyant. Checking how much in line with Akuzawa's model I am doing this will have to wait until I am in Tokyo from May.
As for whether your doing properly or not????????????????
It sounds like you have tight psoas/hip flexors they will pull the pelvis forward and down if you widen your stance. go for a lunge stretch. (thats if I read the above correctly)