I'm playing with k2so everything works fine so far but the crusher. I cannot use it to crush stone. It says I have to research it on the Foliax and I have not been to Foliax yet due Lignumis. So in the mean time I have been using crushing industry crusher but its has got to the point of being inconvenient. It says cannot be smelted apparently.

what other planets are you playing with? if the original tech is missing, it means another planet has changed it, foliax doesnt remove techs and it says it has to be learned on foliax because its the only remaining unlock for it. i believe (havent played it) that muluna does things with crushers and maybe k2so has compat with that to just use theirs.