WinD,
Here is the deal.
The sums are 1 thru 27. The pick-3 sums and roots chart have all 210 box combinations. The 10 column sum chart is a breakdown of any sum with the same last digit. For example, sum 1,11 and 21 have the same last digit. On the 10 column sum chart it will be listed has sum 1 or row 1. The roots are any 2 digit sum added together. For example sum 11 will 1+1 = 2. 2 is the root for sum 11. There are only 10 roots( 0 thru 9). All the roots have 3 sums tied to them except two or three. The roots actual comes in handy. Sometimes a overdue root is connected to a overdue sum. Here is a example of how my chart is setup. It will help you understand a little better. I will do last week evening draw.
# Sum Row Root
807 15 5 6
827 17 7 8
798 24 4 6
337 13 3 4
132 6 6 6
378 18 8 9
976 22 2 4
Has you can see root 6 have two different sums tied to it that fell last week. You will have to do a chart for at least 2 months to notice what type of patttern you want to play. There are at least 2 to 3 different patterns that stays on course everyweek. Just look for what sum and root that is hot and falling everyweek. You will need a pick 3 sums and root chart so you can see the numbers for each sum. Hope this help.