I read and watched the videos you posted awhile ago.
I was all thru FIFI a few years ago, made me cry. It was near sixty years ago, that I volunteered to be a crew member on one of those. When you are young and STUPID you do stupid things.
I could not pass the physical for pilot training so they offered me a chance to go along anyway, never figured that out. Flying B-29s was always at the least, an adventure and most times terrifying death cheaters, there was no such thing as "routine flight".