With this tracking it appears that I am able to find due combos in the exact pairs and the sums and roots.
The roots seem to more clearly define due combos by the percentages at the skip levels.
I only track no match so doubles are not in this tracking.

There are other areas I am studying in this too. Various avenues to look at the tracking in the software.

I use versabet 3/4 for this. I use the 4 digit game to track the 4 digit tracking list.