It could be set up to build on the quality of the lowest item. With each level of quality above the lowest raising the chance to be say 20% higher. So using an easy high quality item and hard low quality item could get you closer to the next quality without ever taking you way over.

Using the ...

It's possible to enable the wire selectors with a hidden config:

Go to the game menu and CTRL-SHIFT-click Settings, then choose "The rest", then activate circuit-network-selection-always-enabled:
06-24-2026, 20-19-02.png


to get:
06-24-2026, 20-17-23.png


Thank-you! This is exactly what I ...

There are a few settings, like Red/Green wires in the combinator, that lock when not being directly connected too. I'm not sure why, this can make things complicated when setting up a combinator before plugging it in.

Is there a technical reason/limitation for this or a setting to turn it off?