The foundry output buffer is 1000 and the recipe adds 500 each time. Then even with a totally empty output pipe, the molten iron empties at 100 per tick reduced by the fullness factor of the output buffer . This is slow enough that eventually the buffer is over 500 when a craft completes, stalling ...

With molten metals from ores, bonus production tick stops foundry for a tick.

1000 molten metal produced during single tick and 100+ metal still in buffer, foundry has to stop for a tick empty buffers.

After ~5000 fluid per second foundry can no longer empty its buffers fast enough:

+1220 ...

My suggestion was originally posted on Reddit

https://www.reddit.com/r/factorio/comme ... menu_from/

We removed dropdown selection from quality, it would be nice to also have this

I deleted all my achievements in preparation for Space Age. I tried to do GOTLAP + Lazy Bastard in the same run
I got Getting on Track (the regular non-timed one) instantly when I placed locomotive, but failed to get GOTLAP even with 10minutes spare.

The screenshot in reddit thread:
https://www ...