Thank you for that question.
The value is 1 at the wall, indicating the maximum strength, based on the entire collection of masses pulling on the center.
So, I fully agree with what you are describing, though I have not investigated the specific spots where the overwhelmingly outward pull becomes an overwhelmingly inward pull.
I am relying on the storm to understand the model, while gravity of celestial masses in space is of course quite different from wind force experienced at the surface of a planet. In space, there is no such boundary, so the outcomes will be distinct because of that.
For the storm, one can see how winds near the outer area can go in various directions.
What we are seeing is therefore twofold. On the one hand we have gravity built up because of all the masses in a galaxy, so we need to look at the whole to get the value of 1 for the wall. On the other hand, we do have the specific parts showing us their specific behaviors, and we can therefore get oppositional answers (but only in specifics).
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Thank you once again for engaging yourself in this model, Aaron. In general, I have not been able to communicate much about the model with many physicists. The communication is often shorter, more abrupt, perhaps due to my not-communicating well. In my experience rejection occurs often quickly (while I suspect most are not even reading the article). So I like it a lot that you showed interest in the model.