What does this mod do?

It removes tungsten ingredients from the Speed module 3 recipe.

Which tungsten ingredients are removed?

It removes tungsten-carbide, tungsten-plate, and tungsten-ore if any of them appear in the speed-module-3 recipe.

Does it change anything else?

No. It only changes the Speed module 3 recipe.

Is it safe for existing saves?

Yes. It is a prototype-stage recipe tweak with no runtime scripts or migrations.