System 6A is a System 6 board without IC9 and IC10 and with 7 segment displays. We asked Steve Ritchie if the production run of this game was cut short to reallocate resources for the continued production of the popular Williams' 1980 'Black Knight'. He replies:No game is cut short if it can run with the big dogs. If a game is earning money and selling well, then no one will stop it at any factory, believe me. OK, it did happen to me once. Towards the end of the run of Flash, I asked Jack Mittel then-VP of sales why we wouldn't try to push past the 20,000 unit mark. He replied, "We want to leave the market wanting." [Steve refers to Gorgar here:] "Gor's brother Al" is what we used to call Algar. The Gar family kind of died after that. I don't remember BK as having anything to do with Algar's failure. BK was a narrow body and built on a different line than Algar. Algar didn't earn money. I think Al was just a dud of a game. In The Pinball Compendium 1970-1981, designer Claude Fernandez stated he left Williams for Bally while this game was at the whitewood stage and the project was then passed to Tony Kraemer. He states that, as a result, he was not given design credit for this game.