Settlers of Catan Magnetic Pieces Modular Box - No Seafarers

I've been working on adding magnetic bases to my 6-player Settlers of Catan set, using the excellent dividers and organizers uploaded by dassmilytier over here - http://www.thingiverse.com/thing:1749597 . However, I don't care for the seafarers expansion. My favorite thing about Catan is the simplicity, so we usually stick to the base-game, although we sometimes have 5 or 6 players.

Using dassmilytier's organizers with the particular box I had available, I found that the only way to fit the