Still working on 2 more characters, and I still feel like I need to revisit a couple of older outfits.
I wish the Nylon Flight Jacket allowed necklaces to be worn
I thought those slots unlocked after completing a certain rank from a contact.
For the 3rd mod slot, it was Rank 3 from Byron Bloodrose (Criminal) or Grissom (Enforcer)
It does also appear to be the case with a lot of the other added primitives as well
https://i.imgur.com/2QapKgW.png
They all seem to have little bits cut off when in outline mode