Your writing was very interesting, I must say, but I am not agreeing with you at all on all the points you made.
Besides, the biggest no-go you’re doing in the hobby is a tank heater that goes under the terrarium. That is beyond stupidity. Sorry for saying it like that, but it’s true. You can’t do that, it’s completely unnatural when the heat comes from the ground. The heat must come from the top, if scorpions want to escape the heat, they burrow down deep. Basically, you’re killing their natural behavior, which stresses them out and kills them.
The maximum humidity of 40% is not true. You can’t say 40% is the maximum because nature is not like that; scorpions come from different environments. They dig and down there it gets moist.
For scorpion species like Androctonus baluchicus from Pakistan, the humidity ranges in summer between 50–70 %. The same goes for Androctonus crassicauda from the UAE, where they have 60–70 % humidity. Or Hottentotta sousai from southern Morocco, humidity averaging 73%.
Like all Androconus specimens, they dig deep burrows, and naturally, there are moist sections in those burrows.
Also, I don’t see deep substrate in your pictures, scorpions need enough substrate to dig. Besides, pure sand is not what they need; only a few animals like pure sand; they need clay-mixed sand.
And Mycosis is not restricted to captive scorpions; for example, in some areas where Hottentotta franzwerneri lives, they get it naturally. And they can survive it. To prevent mycosis you need good ventilation.
The same goes for they do not need water, as they will get it from their prey. That is also stupid, in the desert or dry areas where they come from, there is morning dew. I made the same mistake when I started the hobby: if you don’t give a scorpion water or moist spots, they will die with a high risk. Scorpions from instars 2–3 can be very fragile; if they get no water, they will die. Scorpions who are in pre-molt and have not eaten for a longer time will have a higher risk of getting stuck in the molt or even dying before they can molt. I know that from scorpion experts, by the way.
Desert Scorpions need a water bowl.