Orbit arrives in three pieces: a solid steel base that feels like it weighs nearly 20 pounds, a thick metal arm with a Philips head screw at one end and a concave magnet at the other, and a spring-loaded cradle with a ball on the back and rubber pads on its four fingers. Assembly is as simple as unscrewing the screw with a self-supplied screwdriver, sticking the bottom of the arm into the base, reattaching the screw and a washer plate under the base,…