I wanted to convey to you, one interesting thought!
It seems to me that your concept of developing equipment, workbenches, furnaces, weapons is, in principle, not true!
The fact is that even I can’t make the machine itself on my knee. To do this, you need at least 2 machines, turning and milling. Nobody! No one can make these machines! No one can make an automatic machine, repair it, yes, make it from scratch, no.
Therefore, it is necessary not to do all this, especially after the apocalypse, there will be so much of this goodness ....
It is necessary that the player finds, machines, furnaces and so on. He brought all this to the shelter and repaired it, restored it. You can somehow learn this, do it from scratch - NEVER!
By the way, this applies to cartridges, no one can make them. Yes, according to the recipe in the game, they will be made, but they will not shoot!
And why???