Hi Bill,
I have built several Traxxas brushless 4WD Slash (similar to the Stampede) Rovers.
Attached are some pictures of those Rover builds.
I built a platform that sits above the chassis to mount the Pixhawk and telemetry transceiver. This is a dual GPS Rover and as you can see the GPSs are mounted as far from the center mounted brushless motor as possible. I also reinforced the spring towers with aluminum angle pieces to help stabilize the Rover incase of a rollover which does occur occasionally.
Regards,
Tom C AVD
