Yep, for some reason the mod locks the rib operation behind the research. Just the ribs.
If you want to take that requirement out, look in "Recipe_BionicProsthetics" under RecipeDefs in EPOE and remove <researchPrerequisite>RibReplacements</researchPrerequisite> from the 4 ribs operations.
You'll still need the research to craft them, but you'll no longer need it to put 'em on if you want to start with them.
EDIT: woops. not sure how PC actually handles these. ignore this comment ^
If you want to take that requirement out, look in "Recipe_BionicProsthetics" under RecipeDefs in EPOE and remove <researchPrerequisite>RibReplacements</researchPrerequisite> from the 4 ribs operations.
You'll still need the research to craft them, but you'll no longer need it to put 'em on if you want to start with them.
EDIT: woops. not sure how PC actually handles these. ignore this comment ^