Let's play, I can't read the chart on the entry in the Holocaust Encyclopedia...shall we?
The chart
https://holocaustencyclopedia.com/techn ... n-devices/
Entry for Kurt Marcus
https://holocaustencyclopedia.com/witne ... rcus-kurt/
(He appears to be a victim, not a perpetrator, my bad. For some reason I thought this was a 'perpetrator' confession...)
Zyklon was introduced by sprinkling it through a hole onto a net hanging beneath the ceiling.
I read net as 'net/mesh/screen'.
Muller, round, sheet metal.
Nyiszli, round, pipes.
Obrycki, gas grenade/cartridge
Piazza, cylinders 'ejected' into the room, that sometimes failed to break on impact.
Tabeau, bombs installed in the ventilation system.
Weiss, forced air fans in pillars.
I wouldn't call this 'harmony'.
Of note, the guy Hoess put in charge of the gassing operation at the Kremas at Birkenau (alleged by Hoess, Muller etc), was unaware of the layout of the Kremas, and, when offered more time in prison, instead of the rope, was unable to confirm allied propaganda about the process, because he didn't know.
Otto Moll
https://holocaustencyclopedia.com/witne ... -otto/693/
When asked about the operations at the so-called Birkenau bunkers, he insisted that he did not know what the interrogator was talking about. Moll did not even change his mind when the interrogator pointed out to him that he was already a dead man, and that they would let him live only as long as he was willing to talk and confess.