Thanks xengrifter for pointing me to this thread.
I just looked at the cards, and the 2D H17 index mentioned above is not as described by BetWise21.
To clarify, here are what my cards show for splitting 77v8 (DAS only in each case):
1 Deck H17 DAS index is -4.
1 Deck S17 DAS index is -5.
(These should be the same, yet they are not. I ran the calculations for each rule variation, even for occasions when S17 and H17 are identical. The fact that I got indexes that differ by 1 indicates this is a very close call between -4 and -5.)
2 Deck H17 DAS index is -1.
2 Deck S17 DAS index is -1.
6 Deck H17 DAS index is +3.
6 Deck S17 DAS index is +3.
So, with the exception of the small variation in 1-deck, I'll stick with these indexes. The difference between DonS' 2D index of 0 compared to my -1 is minimal, and could be a difference in methodology or assumptions.
I probably have some notes here somewhere about the exact methodology I used, but it will suffice to say that it was a long iterative process of fine-tuning indexes, and repeating until things stopped changing. I used Qfit's software to create them, and lots of hours.
If anyone is concerned about a difference here or there by a point (or sometimes even two!), they should spend some time generating indexes themselves. They'll soon see why published references often differ a little. Small assumptions can have unexpected impacts, and some decisions are simply very, very close. You really can just relax and use the numbers.