will be good! if you at all add this mod to the tech tree in early stages - it will be match with this SpectralDrones tech. Yuo can build the dedicated tech tree branch for this.
I think drones itself could be add as part of Automation research - as dependant tech. And you will be allowed to use 2 of them at the begining.
Then, you can add the progression of how much drones you can have simultaneously, starting from 2 and adding by 1-2 per tech to cap at 10, I think. Maybe stretch this improvements to blue science. Maybe finished this with unlim count under production science. Spectral mode could be, for example, under military science.
Also this can be configurable option, for those who dont like vanilla robots or want more than 10))
(again, very thanks for supporting this mod!!!)