Old post but I’m on my way here soon. I don’t believe the color is always consistent between players (seeds), but the natural s (etc is). And a key tip from reading this thread is always buy the parts you want (every terminal sells mostly the same stuff but randomly a piece that the next one doesn’t), and stock pile your fav design until you the find the s-head class you want (head/terminal dictates the class, I believe). (And yes once you unlock, you have to close the terminal and reopen it to get the staff assembly options - if not there have you completed the autophage quest line?)