I much admire your perseverance in these matters!
I was driven mildly insane when looking into the steering yoke issue when I discovered there were so many hidden variations.
Thanks for your comment. I hadn't seen your earlier thread but I would have been surprised if I were the only one being driven insane by this.
I took a few minutes from my writing assignment to take photos of four variations of bottom yokes I found on the self and had sitting on the garage floor. Note the difference in location and size of the steering stops, the presence or absence of tapped holes in the stops, and whether the yokes have a dimple or a hole. The inset has yokes back-to-back to show two of the fork stops in greater detail. I don't know what models these yokes are from, nor if there are additional variations, but the photograph illustrates at least some of the variables we're dealing with.
p.s. it's not clear from the photo but the yoke at the right has a dimple. Counting the two others that are the same as ones in this photo, and three that are on my bikes, that makes nine yokes in my collection that either have a dimple, or a hole in place of the dimple. At least that's one feature that's easy to look for even if we don't yet know which bikes should have dimples and which should have holes.