Does anyone figure their own RPI?

Here you go...........

1st Article - is a step by step how to calculate RPI

https://www.ehow.com/how-does_5143295_rpi-calculated.html

2nd Article - gives the differences between calculating college basketball RPI and MLB RPI - with some example calculations.

https://en.wikipedia.org/wiki/Ratings_Percentage_Index

Now I have heard that the way ESPN calcualted RPI is a little different than the calcualtions in these articles.....they add a little "secret sauce" if you will......no idea if that's accurate.

Lastly, this should be relatively easy to automate in excel - but not sure what the value of doing that would be for the current season - maybe if you wanted to bactest for previous seasons - i guess.