HEavy Sixers can vary wildly from run to run externally and internally. The earliest units had no channel A/B (or 2/3) selector on the bottom anywhere, some had the hole and no switch, and some had the hole and the switch (my original 77' I had in high school was the latter, not sure what my new one will be yet). Most used FFC Cables in white to bridge the control board to the motherboard, though later ones used red or dark gray. The earliest units had what I call "PEanut Brittle" Capacitors instead of the usual dipped green capcitors we see in most examples from 1978 onward (they look like pieces of brown Peanut Brittle with 2 legs soldered to the board). It also seems the HEavy Sixers hold up the best of the lost as the heavier plastic on the bottom protects everything else from getting banged up, and most of the components are of a much higher quality.

The Four Switch "Woody" Consoles are almost as wild in variation as the original 1977 SUnnyvales are. They were made by 3 different makers: Dimerco Electronics (Hong Kong), TRW (Taiwan), and Atari COnsumer Electronics Division (Taiwan). Some had parts from the Light Sixer mixed in, such as top covers with the speaker vents AND the 4-switch power/controller port and switch openings, while later ones did not have the "vents", or the bottom part of a Light Sixer with the channel hole, and a thin adhesive blanking plate over where the power and controller jacks would go. THe later models were the same as the "Vader" variants but with a woodgrain front end.