Robot Subsystem #1: Chassis - VEX ROBOTICS COMPETITION
Curriculum (STEM Labs) - Education - V5 - VEX Robotics
I don't recommend X-drives, but incase any team out there wants to build one, you can use this as a starting point : r/vex
Creating a Tournament - BLRS Wiki
To West Coast or Not to West Coast (Chassis/Drive) - Technical Discussion - Chief Delphi
Why do we keep doing this : r/vex
Wheel Diameters, Bumps and Traction
Greenbelt Robots Compete at National Championship - Greenbelt Online
X-Drive with gearing - VRC - VEX Forum