Don't you hate it when you run out of space for inserters when trying to be compact. Boy do i have the solution for you! With 2, 3, 4, 5, 6, 7 and 8 arm variants, you can do anything you desire!
Mods introducing new content into the game.
Augmented or new ways of transporting materials - belts, inserters, pipes!
Entities which interact with the circuit network.