James,
the difference between BL and Frazier appears to be more than one step as Alan observed.
Also, on your Altgens view.
You have Lovelady coming down to meet his position for Ike's photo but that doesn't appear correct.
His position in Altgens is the highest we see him and he's in the that same position in Wiegman IMO because we still see a slight leaning, then it's from from that position he goes down to a lower step.
The Texas Two Step...
Barry and Alan, I suppose I should eat my hat, but would rather eat Ruth Dean's hat. I had purposely modeled her height to represent the apparent height to the top of her hat, but exaggerated it a few inches. I now represent her matching eye levels. That looks more natural.
Then I placed Lovelady on the landing, 1 step down and 2 steps down and animated that versus a Wiegman W2 frame. I can agree with you and Alan that Lovelady does appear to be on step 5 in the second pass of Wiegman's view of the doorway. That does not change my opinion of him being on the landing in W1 and step 6 for Altgens6. Sorry for any trouble this might have caused anyone.
p.s.
I might consider adding 2? to Frazier's height, based on past and now personal enhancements from the deep shadow of the doorway. But that would make him about 6'3?. Do we have a hard number for his height?
p.p.s
I also remodeled the horizontal aluminum frame by changing it from a slender cylinder to a box shape with more width. That may help visualization of Frazier in doorway. Disguised warning, don't use Frazier's height for quantitative estimations in this model at this time.