Wood train depot

This is a train garage / depot / roudhouse for Ikea / Thomas / Hape / Brio wood train.
It was designed around the octagon Ikea turn table (LILLABO) but should be compatible with other brands.
It used to use the door from https://www.thingiverse.com/thing:2396178 but the door is no longer available, so I made one that fits the dimensions.

It's designed to use cardboard for the walls to save on filament and print time. The grooves should accept up to 2.5mm cardboard.
The cardboard walls should be cut to 93mm high sections. I used normal glue to secure it in the grooves.

Attached 2 roof, a heli-roof and a basic roof that can be customized. You can also just use cardboard for the roof.

Designed in Fusion 360, file attached.