You may want to inlcude blueprints as part of the tech unlock progress. As it is, I am currently stalled out in my game because I can't get the small accumulator blueprint, which leads to the Rover. So I have to walk kilometers to go to abandoned bases in the hopes of finding a lone blueprint. Not sure what the odds are of that, especially since tablets are pretty scarce (I've found 3, total). Having the prints unlock as part of the advancement process would make sense.
0.0169259