Since the CST-100 isn't actually in service yet there isn't as much information that I can access, but nonetheless I built the replica using what I have.
The next step was to make performance changes and add launch mounts
The final step was farther performance changes and changing the OMS (Orbital Maneuvering System) to a different engine position configuration, but that isn't visible unless you look underneath the capsule
Finally here is my version compared with a rendering of the real thing