Great video. Something I want to touch on:

He kinda makes the assertion that supply must exceed demand which I guess is ok for most items.

Especially in SA once you leave a surface, demand of most items will plummet close to 0. The only demand will be ship requests and defense stuff.

But I can't count the number of times I had to go back and increase iron plate production, green chips, copper, red chips, etc... It's always the same few items but as your factory grows, demand seems to always beat supply at multiple stages.

In those cases these kinds of balancers will not distribute the little supply evenly, making parts of the factory grind to a halt which is not ideal.