I wouldn't recommend trying to balance the oxygen furnaces running on copper's literal exhaust fumes and a trickle of wood but it seems to be working properly at x64 speed and it's making me acid gas for sulfuric acid for free. It's also making me sand casting for the chromite next door, and free chromite from rich dust to supply the mine. The rest gets voided when the chests are full. The coal dust actually ratios almost perfectly to the 5 oxygen furnaces because I'm not producing a perfect copper 4 ratio, but if I don't have the wood to jumpstart it again, it can deadlock every hour or so that one inserter is vital. I've thought of centrifuging the ash for a bit of extra coal dust but it didn't really seem to be that big of an issue and I'm planning on switching to the gravel->tar and ash-> flue gas->acid gas recipe later on, the chests will last me ~10 hours anyway.

Probably should have just brought some coke by train but this gets rid of all the byproducts in any case and that was the main issue. And the extra leftover chest of logs I got by clearing the space for the build which will last until the ash is filled up so I don't even need to bother with a minimal log automation.

I hope the iron 2 build is at least a bit more compact. The jump in complexity between py1 and logistic ore recipes is somewhat ridiculous. Lead 1 is perfect in every way at the moment but I'm gonna need silver eventually for fetal serum so that's on the list along with tin for the better solder recipe.