I wonder what the odds would be if you used the martingale progression of 15,20,40,80,160 in say a +1 TC or better. I guess the math becomes a lot harder because you have to figure out what the odds would be of getting a TC >= +1 for 8 decks in one hour, then figure out what the odds of you losing 5 hands in a row (losing a dd would be like losing 2 hands) when the TC is that good, then you have to figure out what is the average # of hands you'll get when a count is good and probably like 3 other things I'm missing. I'm going to guess that it's right around 67% as well.