Arduino best way to count and upload CPM?

So, I'm upgrading and updating my station and I'm trying to figure out the best way to upload my total CPM as the SI-22G are very sensitive.
e.g. SMB-20 counts +- 21 CPM for my location, while the SI-22G counts 83 CPM

Tube minimize the error rates, I now have two SI-22G tubes that are connected respectively to INT0 and INT1 on my Arduino.
The CPM math is being handled with an Arduino Moving Average Library and does the following:

• Tube 1 counts per seconds go into an movingAverage array 1 that is 60 large (e.g counts 0-94 -> AVG = 45)
• Tube 2 counts per seconds go into an movingAverage array 2 that is also 60 large (e.g. counts 0-87 -> AVG = 45)
• movingAverage array 3 is 120 large and Tube 1 and 2 their CPS is added there to calculate the moving average -> 20 CPM

Why moving average? As it can store each count per second (CPS) as a value and then calculate the average of it over 60 samples (count per minute).
Then I do this for tube 1 and 2 and then recalculate it for a global moving average to got the actual CPM between two tubes.

Is my approach good or am I overthinking it and should I then simple it down?
I'll try to provide a link with my ino file for those who are interested.

Thanks!

I think I got it, the current uploads looks similar to the background radiation of Radu from pocketmagic for his SI-22G tube.

My code: https://pastebin.com/M97sNxNX
Might needs some fine tuning.