(robot
 (angle-bracket
  (size (.5 inches by .5 inches))
  (thread 6-32)
  (from evil-mad-science
   (url http://shop.evilmadscientist.com/productsmenu/partsmenu/465-bracket?qh=YTo0OntpOjA7czo1OiJhbmdsZSI7aToxO3M6NjoiYW5nbGVzIjtpOjI7czo3OiJicmFja2V0IjtpOjM7czo4OiJicmFja2V0cyI7fQ%3D%3D)))
 (wheel-mount
  (size (1.5 inches by 2 inches by 3/16 inches))
  (large-hole
   (.938 inches from edge to center of hole)
   (.5 inches from the 2-inch side)
   (big hole for motor shaft lip = 0.362 inches))
  (nubbin-hole
   (size (11/64 inches)))
  (motor-long-screws-holes
  (screws (size (length 1.175 inches)
                (thread 4-40)))))
 (wheel (diameter 2.75 inches))
 (motor (https://solarbotics.com/download.php?file=92))
 (platform 8 inches by 8 inches by 3/16 inches)
 (4-aa-battery-pack (size (2.75 inches by 3 inches by 3/4 inches)))
 (9v-battery-pack (size (13/16 inches by 1 5/16 by 2.75 inches)))
 (castor
  (url http://www.pololu.com/catalog/category/45)))