I have two things to ask about: 1. I was playing with the circuit networks in factorio and I missed something. There could be some kind of machine that can be connected to circuit network and is able to send messages to player. That may be used to tell player that production of something was finishe...

Maybe any moderator can say something about that?

There is a problem with destroing big alien bases or with destroing them in end-game. The solution is adding a mech like that in Avatar movie: http://vignette3.wikia.nocookie.net/jamescameronsavatar/images/a/a2/Screenshot062.jpg/revision/latest?cb=20131227224259 This mech will have equipment window ...