RC Crawler Obstacle #2: Complex Mountain v2

I remixed it to include a void in the middle, to save some time and filament when printing.

I also fixed a missing layer under the main arch that would cause the print to fail.  I would strongly recommend not to print the original without fixing this error first.  

I have also scaled it down to fit on the 235x235 of an Ender 3 v2 bed.

I printed in generic PLA with fuzzy skin, as the original author suggests, which give excellent grip for a lot of crawler tyres.