Hobby exploits 2020 and onward
Caterpillar 5000 - the Aliens' powerloader
Caterpillar
Thingiverse is littered with different iterations of this fictional machine, but from I found out this one scales best to 28 mm.
I printed two of them at once as terrain props for my ever-growing spaceship terrain collection.
I love the power loader!
Cheers mate!