Description
Can even make LDS!
* Bottom combinator does each-passthrough, combined with latch-logic to ensure that it starts making molten metal if it drops below 5K until there's 20K.
* Selector combinator picks one signal; molten metals get highest value for highest priority.
* Combinator above that uses each-passthrough to tell inserters to pull ore or plastic out of the chest.
* Combinator above that reads the belt to block the signal if the belt is full.