OK, let's start with something simple. You teach aikido. How many people do you have to work with to have them keep their shoulders down and relaxed. It's very common - among not only beginners, but guys with a bit of muscle bulk to do a few predictable things: They lock their shoulders up - thus coupling the shoulder with their torso - and, the hold their breath - and then try to muscle their way through it. And, you, as I'm sure you do show them how to ....lower...relax...release the shoulders, in order to let the - whatever you call it - ki, power, energy, path - travel through their arms - rather than being blocked at the shoulder point. And it's that decoupling of the shoulder from the torso that allows the .....[insert ki-ish word of your choice] to flow.
It's the same with the feet and toes. coupled toes to feet are the same as coupled shoulders/arms to torso. If you stand feet flat on the floor, you're feet - under the pressure of your body are coupled to the floor. The flow of energy is blocked - at least enough to not allow for the power (directed, transformed energy) to move out of the body and into the ground.
By creating a point - big toe, other toes, one of two points on outer ball, and one on heel - take your pick - you decouple the body from the floor - creating a drain channel for the energy - which, at that point, has been transformed from energy into power.
Also, in the case of getting hit - rather than the vibrations of the hit remaining in the body - they can quickly be discharged into the ground.
I hope that helps. Let me know if you could explain it. I'm still working on a good model to explain the cones and decoupling. I'm getting there. LOL.... and I appreciate you're helping me pick this apart.
O.K. Thanks again. I get the idea.
Well, your talking 'points' and talking 'cones' I assume the point is the point of the cone. Then you are talking 'allowing energy through to the ground.'
I have an understanding on points and the practice of using one point and of moving one point to any point you choose. I can thus do that for as you put it decoupling. All very interesting but I find in the end not too necessary myself for it can all be done from centre. Ie: With enough practice of centre the 'decoupling' happens naturally.
As far as it being needed on parts of the feet in order to allow energy to 'ground' I don't find it necessary. You can have feet flat and do so, you can sit seiza and do so, you can sit on a chair and do so.
So for me it sounds too complex. However I do use a point to allow energy to 'earth' at first different to centre I call Koshi for it is at the back of the hips? base of spine area.
Now here's a concept similar to yours I use or teach to help which is similar to your cone one and in life, although man made, there is an example with two cones. The egg timer. One opens to heaven and one to earth.
So that's me. Enjoy your research. G.