If my friend plays 9/6 DDB strategy on a 10/7 DB machine what does her return percentage fall to? What I'm trying to figure out is it better for them to play on a 9/6 DDB machine or a 10/7 DB machine even though they don't know the correct strategy all of the time. I can remember in Dancer's original 10/7 publication, he said that playing JOB strategy on a 10/7 machine would still result in a better return than JOB would the same hold true here??