I'll leave all that below so people can see but i misread your comment thinking you meant to put a chest at the ore output. it is i good idea to store the iron into a chest i just didn't feel like it was needed but is something you could do if you wanted. sorry if i caused offense.

the ratio for ...

This is a post that i hope to add and change depending on what i'm doing. It is here to help myself and maybe others who want to learn a bit of my take on designs and the math behind choices i make in the game. This i based on my views and i do not care if their is a more efficient design out there ...