My MP Is working with a non-vari bright grey scale grid. The documentation was clear and easy to follow. I used tape to write the column labels on my grid. I think I have a handle on presets and row ranges now but since I have a non-vari bright I know I’m missing some details.
I’m not having a lot of success apply changes to the rules (speed, position, or both) even though I am pressing colum 5, 6, and 7 with rows operating in a range. I’ll keep experimenting 
Thanks again for your contribution!