I usually play 6D shoes, and I use Hi-Lo with strategy numbers from PB by Wong. On a recent trip to Vegas, I "discovered" a wonderful thing: ten-dollar DD. The places I had been to before had DD only at $25 or more. But now that I know that $10 DD exists, I will play DD exclusively (I now understand why people say that you have to look for good games). My question is: are the strategy numbers in the first few chapters of Professional Blackjack significantly different from the numbers for DD? If so, where can I find the numbers for DD? The appendices give numbers for only 1D and 4D, and I'm assuming that the numbers in the first few chapters are for 6D. Thanks