I came across jdpeter's brilliant design for Century: Golem Edition, but couldn't find a similar design for the Century: Spice series that would fit all 3 games into one box without lid lift. I figured I'd try to adapt his design (and mrgigg's player pieces remix) to the Century: Spice series.

Changes I made:

1. Player pieces boxes:
   1. Eastern Wonders pieces need more space
   2. New World pieces are tiny
2. Tiles/token holders:
   1. Eastern Wonders sea tiles swirl instead of being just plain old hexagons (…why…)
   2. Eastern Wonders bonus tiles had slight differences in length/width
   3. New World bonus tiles had slight differences in length/width
3. Coin holder:
   1. It was a bit too tight, so I made a new one (it's not as nicely designed, but it works)

I've only uploaded the models that I edited/created. Please get the rest from jdpeter's model on thingiverse:

1. Spice/gem trays
2. Card trays (does not fit sleeved cards)
3. Eastern vp tray

Oh, and one thing to note: I tried fitting this insert into the different game boxes and found that it worked in my copy of Spice Road and New World, but not in Eastern Wonders due to a slightly narrower width. Your mileage might vary :/