There's a bunch of guys that hang out at the hobby shop that are really heavy into the crawler scene.
Even so much that one of us has started building a killer course behind his house.
So that led to classes and rules but not the same as you might find at a national event or things like Axialfest.
Three classes total (for now), and I've personally had both class 1 and 2 covered with my TRX4 and my SCX10 iii.
So I needed a good class 3 rig and first thought I'd build one using parts from different rigs until I started to price it all out.
So I decided to go a different direction.