As a mighty engineer with a quite sturdy pickaxe you must have been thinking: "Why can't I mine out the cliffs?", "God this is frustrating, but cliff explosives are yet to research" and so on and on.
Now with this mod you and your factory is a force to be reckoned with, the force, that won't be stalled by some pesky cliffs, for you can now slowly and steadily, but mine the cliffs by your trusty sturdy pickaxe to lay down your bus without problems to keep the factory growing.

*As a side-effect, due to how cliffs and construction bots work, bots can now dismantle cliffs without explosives, and I really have no idea if this can be fixed.