Changes:
* relocated Pi’s battery to undercarriage
* corrected dimensions for ultrasonic and IR sensors
* showing IR in “table edge seeking” position
* updated bumper for larger catchment
* relocated motor controllers to left/right from fore/aft
* added PCB where connections will reside
* hard to see but opened a window above Pi to allow view of Sensor Hat
* and big ugly brown thing will be a claw
Newbury Pi 