Yeah, I do. LOL. Even talked to Mooch first before building. Got the battery stats and stress test charts. Those cells will handle 70A for a 5 second pulse with 30 second break between hits. I only pulse 2 1/2 seconds. My attys have massive airflow for those builds. That mutationX has 9 air holes on each side, plus 1 at the base on each side.
MutationX V4
I also tend to pick the batteries with the lowest running temperature as well. No two 20,25,30A are the same, some just have a better internal chemistry. That is why I only use Big3 branded batteries. I
KNOW what is in them.
The Best 18650 Batteries for Vaping is a handy site, the author is Mooch.