This doesn't really agree with the above poster, but my Technical Writing
book always said tailor you writing to your audience. You have to figure that fairly intelligent people would by a Vex robot. Although there is a market for younger kids who have graduated from legos (but I still havent
).
If I were doing this, I'd include an overview of the robot, a section with the functions/how to operate them, a troubleshooting guide with common issues, and a FAQ.
Note: I have never been introduced to the VEX 'stuff' so my ideas might not fit exactly.