Having to use an entire Portable Fission Reactor for only a single bot feels a bit too expensive to me, so it'd be nice if there was a config option to change the yield (e.g. setting it to 5 makes it use 5 bots and 1 reactor to make 5 atomic bots), or change the required item (e.g. replacing the reactor with 10 uranium fuel cells).

Same for me, very expensive in Vanilla with no Space Age DLC or Krastorio. Anyway, fortemp fix you can just edit mod on your side (make sure you do it when Factorio is closed).

Navigate to "AppData\Roaming\Factorio\mods" on your PC and apon the Atomic Robots zip file.

In there go inside "/prototypes/recipes.lua" and open it with notepad or whatever you like.

Simply change line "{type="item", name="fission-reactor-equipment", amount=1}," to what ever you like (or you can even delete the line). Names of items can be found on Factorio Wiki :-).

I hope author of this addon will add some GUI options under settings, Me personaly, Im using Uranium fuel cell as ingredient.