Advanced Analysis cell limit tuning against BW

We currently use the default cell limit of 500,000 but recently our user feedback would like to double the limit to 1,000,000 cells. I favor the option of referencing the BW object which limits the output and not the registry key entry referenced by Advanced Analysis Admin guide.

Are there any Best Practices or write-ups which go over the above exercise? I don't want to reinvent the wheel

AA version 1.3.5

BW version 7.31 P5

Thanks!