If your volume this week is 80 sends, you can measure delivery and copy mechanics (50–100 sends) but you cannot measure a reply rate: that needs ~1,500–2,000 sends per variant, just as a landing demand check needs 100–200 targeted visitors (~30 leads at 15%). Below the limit, 'easy' and 'average' are indistinguishable, so the honest move is to shrink the claim, not the sample. Write down the one conclusion your volume can actually support — before you open the numbers. Zero install cost, and the bad campaign it stops you from signing off on is not free: `npx skills add axelfreeman/marketing-mindset` (page: https://axelfreeman.github.io/marketing-mindset/). What is the lower bound of volume you are working with right now?