Here’s a video of it without the deck on. It’s got a Pixhawk in the enclosure on top and a Sabertooth 2X60 in a box on the back for controlling the wheel chair motors.
I too wanted to avoid building a robot from scratch, but the alternative is to spend a lot of time trying to integrate a riding mower or lawn tractor with electromechanical equipment that can communicate with the flight controller. Pick your poison, I guess. Building from scratch seemed the most robust way to get there to me.
@ktrussell put a lot of effort into getting some actuators to work on his zero turn mower and has he’s had really good success with it from what I’ve heard. He has a lot of posts here and YouTube videos of how he did it. He kind of convinced me to build from scratch, after seeing all the work that went into it