I have no animosity toward 45D and am sure he is a fine gunsmith working on open tops...lots of people praise his work.
I wish he would come down from his high horse and admit reality, that's all.
Not sure how you parse that. By saying high horse you indeed show animus.
What I do say is he opened my closed mind (ask my wife, it tends to stay closed).
He supports his work with proof. And that is a modern Open Top is capable of far more than it was (or currently generally is) given credit.
As a non lettered but designated engineer (I had to have working knowledge of a lot of stuff) , he is correct, it is a frame. It is just not an bottom and top frame, but it is an O frame for lack of better term (girder system maybe).
I was involved in a Hangar build many years back. The Original was a very severely overbuilt I Beam type (more complicated but it had that form). The supports that needed stronger were just thicker steel in those beams. It was removed after partly assembled, not due to the steel as an issue, but they did not weld it to spec and the sub spec welds were found.
Its replacement was a web design. Rather than solid I beam slabs it was interlaced with angle support much like a house truss (and house joists that use a I beam type in composites are now used).
Neither design was better than the other. Its where you wanted to put your money in that case. Brute engineering or a lot of engineering for the lattice work.
The Brute force did not frail on force, it failed on poor welding. If welded to the correct spec it was approved. The Frame package in fact was bought and assembled in an area that did not have the welding specs a Seismic IV zone has.
I am not saying that the Colt Open Top was superior nor do I believe 45D is saying that. It is a lot stronger than given credit for and he is exploring the boundaries of that with modern replica's that have the steel type needed to go there.