I've created a video with build details here:    • DIY Autonomous GPS Mower  Parts List...  

This is my build of an autonomous mower. My farm has lots of long narrow lanes to be mowed and rather than purchase a GPS driven mower ($5 thousand and up!) I built one. It's components are:
1. Mission planner/Ardurover
2. Drivetrain Battery, electronic speed controller, electric bike motors
3. Frame and wheel assemblies fabricated by hand
4. Gas push mower

This was a fun build to create and is even more fun to watch in action. Enjoy!