Yes, SuperFrog they are supposed to be that low. I did this recipe for a FA contest and wanted to prove how low you can use these flavorings. Like you said this is an unusual and interesting recipe. :)
I had to sub nano for banana shisha at the same % due to stash limitations. The flavours are here and not muted, not 100% sure about the profile but hey, that is down to taste. Pistachio is not super present from the get go but this is one of the best feel of Catalan cream I have had.
I am impressed and this makes me consider the rest of my mixing. Thanks!