Quote Originally Posted by Dustytome View Post
Just requires rank 17. Just be aware that the stats aren't a direct upgrade from the previous tier, some are higher and some are lower.
I"m so glad about this, Hit Rank 17 myself last night and upon seeing how unique the stats of each Sub part are, I'm looking forward to the release of the next parts.

Looks like Mixing Matching will be a lot more thinking than this only Does +X and -Y.