The Infinite Room needs timers and a few more battery boxes, but is otherwise complete. The engines can run indefinitely, but are pretty quick to reach full speed, so I'd still turn off when done. The Magma Crucible for infinite lava/obsidian uses a considerable amount of power, so unless one needs it, I'd leave it off. The Pulverizer and Powered Furnace will run at full speed effortlessly during the day if the Crucible is off.
