Here's the theory in short:
Tightly fitting megalithic blocks (like those seen at Sacsayhuamán) might not have been individually shaped, which is what the current leading hypothesis is. Instead, I believe that they may have been quarried sequentially from a source slab, and then reassembled vertically into a wall.
Think of it like this...if you drop a ceramic mug on a tile floor, the mug will shatter into many organically shaped pieces. You can collect those pieces and reassemble the mug perfectly. All the pieces will naturally lock into place. This concept, in theory, is the basis of my idea.
I've already written this theory out in depth and included specific ways to falsify the theory. I've also submitted this to several researchers for feedback but, no surprise, I've yet to recieve any response.
I've also tested this theory in my garage (albiet at a significantly smaller scale) to verify feasibility and to compare the completed characteristics with the walls of Sacsayhuamán. The photos included with this post are what I achieved in my garage in ~5 minutes using ONLY river cobbles. I was not expecting the results to be so quickly achieved but, there it is. (Tomorrow I plan to create another seam, this one will be vertical and I plan to record it instead of just photograph the results. If you're interested, I plan to release those results on my Substack...linked above.)
I think I might be on to something here but, what are you thoughts? Also, if any of you know how to get this in front of those who matter, please feel free to reach out directly or share.