I finished mine, only a few months ago. A mathematical theory of everything, followed in short order by a physical theory of everything.
Simplistically speaking, it's a double M-theory, with 41 dimensions, but, with a slight twist. Things reflect about dimension-42 (one of two sets of gravitational and electromagnetic fields) to yield the other version of our universe, at dimension-43. The idea is that the two universes grow out of each other to co-exist in the higher/lower dimensions from 40 to 42, and 42 to 44, respectively. As 1-d space-times takes on the properties of 3-d space-time, and, versa. The same old same old four basic dimensions, but which commence at dimension-40. It's just that I think that motion is more different from time, still, and, that motion, mass, and momentum, rather than acceleration, mass, and force, are what effectively drive the universe.
How do I know I am right. A year or two ago, I chanced on some numerals that were like a billion-to-one shot against just occurring together with so little to go on. I did the same sort and degree of thing in different ways two or three more times since. Not that I had any terribly firm idea what I was doing specifically, let alone for the thirty-five or so years up to that point in general. Regardless, slowly, I was able to put things into a much more definite mathematical light. And, then, as luckily, I found a/the corresponding physical representation. Connecting up the two different sets of fine-structure constants was yet another way to better understand and confirm what's happening here.
I estimate another year before I begin to put it up on some of the such professional internet forums. Not because I am left with any doubts about it, but, because my hands are tied with other projects that mean as much to my sense of integrity. Obligation in the sense that my inclination for finding the truth is the same. One can't thus sincerely and steadfastly pursue one thing, but not the others. The additional time off from it will allow me to further subconsciously streamline it. I have fairly well documented it, so, I'm not overly concerned with moving on to the other stuff.
As well, it's good to have the short bursts of activity on a few of the forums, including this one.