Thanks for the replies!

While I have not been able to directly fix it yet you have given me some excellent lines to continue on.

Controlling the inserter really killed by throughput (I just stopped it from working if it was full, causing a delay on each craft) so while I am still working at it and ...

Hello!

So, after being new to Factorio and loving it, it seems that I have reached an issue that I find hard to solve. I am trying to set the recipy of my foundy to molten iron/copper depending on the needs I have.

I have been able to do this without any problem for doing molten iron into iron ...