Prop broken, Need HELP!

[Yabayabayaba]

there is an awesome prop in https://tf2maps.net/downloads/tf2-emporium-vehicle-prop-pack.440/ that is an awesome train car models/props_vehicles/land/t1_carriage.mdl but it's collision mesh is rotated 90 degrees, idk how to fix it! It can only be a physics or static prop, and I need it to move, so it must be physics. But I can't figure out how to disable the collision mesh on a prop_physics (the debris tag dosn't work). Any ideas, I love the prop and don't want to abandon it!

THanks,
Yaba

 

[Pocket]

FYI any prop can be a dynamic prop; that's why there's not an indicator for it.