The artificial intelligence controlling YouTube's suggested viewing is good for something. I just came across another cool Hot Wheels racing channel...
Guitarded and Broke is running a Modified Madness series on a fat- track, open style course...much like 3DBot Maker's channel. His rules are anything goes, with the weight limits set at 1-100g for Class A, 101-200 grams for Class B, and then, a 201 and over class.
I'm already thinking about a build , so stay tuned :)