I have stopped gaining Electric Experience, but I still have to unlock Battery Printing and Soldering Station. I am basing the thought that this is a bug on my expectation that I should still be gaining experience from my electricity production, and that it should not say 0/0 . Consequently, if for some reason you intended players to need to gather pendrives from probes to gain the last few levels, then I appologise, but on the surface, it does not seem to be the case. P.S. I have the blueprints for Battery Printing and Soldering Station, but can't gain experience to gain the points to actually learn them anymore