Runner's Companion Page 110 (Other Metagenic Qualities)
None of those can be selected in either the Positive or Negative Metagenic Quality section of the Qualities tab.
Enhanced Cyberlimb Armor still does not add to the character's overall armor rating nor does it appear on the armor tab.
Per Shadowrun 20th Core Pg 344:
Armor enhancements installed on cyberlimbs are both Ballistic and Impact, and it is cumulative will all forms of worn armor.
Also the
FAQ:
Does cyberlimb armor for cyber half-limbs add its entire Rating to the character’s Armor Rating in SR4A?
Yes. Armor enhancements to lower arm/lower leg cyberlimbs (and cyberhands/cyberfeet) apply their full Rating to the character’s Armor Rating. Gamemasters may choose to only apply the partial cyberlimb’s attributes, including armor, to tests directly involving said cyberlimb (p.343, SR4A).
The SR4A Changes Document erronously states that this was changed in SR4A, when in fact no such change was made.
Maybe add an option to the character generator to restrict it to only damage resistance tests involving that limb but otherwise not working per RAW.