Hopper car body, for Marklin hobby range car chassis

Hopper body for H0 scale model railroad car. Compatible with Marklin/Trix hobby range of car chassis, as well as the printable chassis I made before.

This is a purely imaginary car roughly based on the 4-axle grain hoppers that are available as a model. I made this shape because it is not commercially available for this type of chassis.

2 versions have been included:
- one with the snap joint to mount on an original Marklin system chassis. This is more difficult to print.
- one with a fl