Many thanks, Sebastien and Tim!

That absolutely makes sense, we just wanted confirmation that this is what was happening. Thanks for clearing up and good to know how to find the ranking of specific pairs and definitely raises questions about how much kerning we need if it's not that likely.

Hey Tim, we’ve ran into a few errors regarding Kern-on, we’ve found that when Kern-on is automatically previewing kerning pairs – this ends up being different to the outputted kerning. See screenshots below. Screenshot 1: Previewed kerning pairs Screenshot 2: Outputted kerning pairs We’re finding th...