Kanban EV - Removable insert car tray

To add onto other Kanban EV inserts sets, I designed and made an insert for the car tray to solve a couple of problems with the gray vacuum formed tray:

1) The vacuum formed gray tray does not accommodate for the extra 5 cars provided.
2) The pace car(s) get stuck easily in their slot making removable a tad cumbersome.

The tray is the same height and size as the original,. and fits in the box well. Designed in Solidworks 2022.

The other trays for the solo game and parts (vouchers/car parts etc) are posted in a make from https://www.thingiverse.com/thing:5140354
Thanks jgrg1!