I really liked the 'Ticket to ride tray' by Wile (https://www.thingiverse.com/Wile) but the trains did not fit like I wanted them to, so I designed trays
...Show more that fit my trains and sit nicely in my TtR box (I have the Ticket to Ride Europe game sold in USA)
The trays are designed to hold the trains with enough friction that you could hold the tray upside down and your trains do not fall out of their spots. The trays also stack on top of each other in the sections in the box already provided so that they reach just below the placement of the folded-up game board. You can also set these trays in front of you to use while you play!
To see if your trains fit this design, print the "Test Train.stl" file.