was at red rock the 12 ddb 10/6 machines between keno and
bingo are now 6 only. the others appear to be triple double
bonus?
These six slant-tops with triple double bonus at Red Rock are the 99.58% 9/7 version, but still require $4 to earn a point according to the sign. And the faceplate says "Optimum Play Triple Double Bonus".