Answers
"Great book Don, a bit advanced math for my simple mind though :)"
Keep rereading. It will sink in!
"The numbers in chapter 10 are generated with a 13,5% ROR with a $10000 bankroll. If I find 13,5% to be too risky could I then adjust to a different bankroll by multiplying the $10000 and dividing the 13,5% with the same number, and vice versa? making a $20000 bankroll have 6,75% ROR, $40000 bankroll have 3,375% ROR and so on..."
No. Raising your bank will lower your ROR, but it won't do so in linear fashion. As you can see from the formula, there is an exponent involved (a number is raised to a power). This means that when you change one of the variables, the output will also change, but not in the straight-line fashion that you describe.
Double the bank in the charts provided, and see what happens to the ROR, when you keep all else the same. The ROR decreases by the SQUARE of the original ROR! So, for $10,000 bank, ROR is 13.5%. For $20,000 of bank, ROR shrinks all the way down to 0.135^2 = 0.018. Get it?
"Also if I find $10000 to be too high and only have a $5000 bankroll could I then adjust a game that returns $60 in the charts to return $30 as I have to cut the units in half to keep the same ROR."
Yes, exactly.
"can you do stuff like this with the charts?"
You can do THAT with the charts!
"Something I don't like with the book is the fact that you have to get BJRM or CVCX(I think) to figure out the size of the units and the optimal betting ramps, I wish that would have been included within the sharts if that's possible."
It was provided, in a limited fashion, in the Fall 2000 BJF, when I concluded the Chapter 12, Part I study. But, in all honesty, the ramps and units were excluded by design. John Auston did an unbelievable amount of work for me, and I felt it only fair to not provide EVERYTHING in the book. You owe it to yourself to get BJRM. You won't be sorry.
Don