I had to take some time out from my "layman mullings" to do some research. Not only was I getting stuck into the thought-lines of my own "model", but I was (purposely?) Ignoring many facts about how bodies interact. Do try to understand that the whole point of all this is trying to find some ideas "outside of the box".
One of the subjects I looked up was atom structure, form and behaviour. Another was the composition of the universe - and there I found how few atoms there are in our universe compared to its size. This led to the subject of still-hypothetical "dark matter". Which only gives more fodder for thought.
I'm going to let go of the concept of 'dimensions' for the moment to just look at our own.
One thing that got me thinking was the 'cooling' aspect of the atomically composed part of our universe: if a, say, planet somehow strayed into outer space to a region free of all light and gravitational influence, it would eventually 'cool' to an almost inactive state; yet this would not be the case, as the planet, because of its mass (atom structure), has an energy of its own. Yet atoms tend to 'degrade', especially unstable ones; but degrade into what?
That question brought the 'energy flow' idea, and the idea that this flow was too 'fast' (or 'reduced') for us to detect, and the idea that most everything in our universe was built upon it. What would happen if we turned our idea of "hot" on its head, and thought along a model where this energy flow (and its 'speed') was a 'neutral state', and that everything slower than it becomes 'denser' and 'hotter' the slower it goes?