Porting Darth Sion is totally possible!
He's an NPC in my K1 Gameplay Improvement mod. I believe it would be possible to make him a player head, however, you wouldn't be able to visibly see Armor equipped on him unless someone was able to do additional work to separate the head from the body.
idk if your still around but I noticed a strange animation glitch while running with a rifle. Hopefully your still around and this is something that is fixable
Thanks Effix will try
Edit: Works brilliantly so far played through Dantooine & Tattooine with no issues, even shows clothes mods outside of vanilla armor eg JC's Slave Bastila outfit mod which is a plus, disguises are also visible as it should be. 😁👍
Recommend using this with Invisible Headgear mod by Shem