Not sure what you mean. The sphere is always there, both in neutral structure and when changing and acting. And connection with the Earth is always part of the equation, even when moving and stepping.
It's all about increasing layers of "stuff" we're doing, with the basic structure and holding of the (intent) sphere as the foundation.
What I'm saying is that so many components are already layered into the spherical force field structure thingy (relaxing, jin, body connections, change management against progressive loads, presumably dantian, etc.) as part of the overall equation that I find it may be challenging for people to understand the basic peng jin component well enough to do the raw work it takes to rewire themselves to move appropriately with just jin (and I know there are many applications of jin but there's just one jin - the application of the qi of earth). Anyways, more cautionary than me trying to accurately describe what you're doing since I only met you once like six or seven years ago. But some others I've met in the interim seem to get stuck on stretching their center out in so many directions that the purity of the ground strengths gets misplaced. Which is a different problem than some others have where they're trying to reach out with their middle in a way that it is given up.