Model originally from VIRUSESOFDEATH on Cults3d.

My .3mf has pre-supported side walls and top/base parts. 

I added two end panels that print much easier than the originals, one blank, and one with a concave tread pattern.

BE CAREFUL: The support material for the side part and top/base parts is very tedious to remove. I use sprue cutters to remove the side part support and the Bambu scraper (with razor blade) to remove the top/base part support. I also recommend passing over with a heat gun or butane torch once support material is removed.

Happy printing!