Gorgeous model! Prints well, and the result is awesome. I love it.
For mine, I printed everything at 0.15mm layer height and 10% infill. For the outer shell and inner city I used 3D Solutech marble PLA, and I printed the insert using blue/green SunLu PETG.
Timelapse video: https://www.instagram.com/p/BvR5AAdnYTY/