Let me say it again, you can take everything out of the end-game tier gear (tionesse, columi, rakata, centurion, champion, and battlemaster) except for the armoring, which dictates armor rating, part of the primary stat (aim, willpower, strength, or cunning) and part of the endurance. You can take out the rest though. The Main hand, off hand, bracers, belt, implants, earpieces, and relics don't have removable pieces.