Finally got around to testing this. Went with 10%, 70/30 VG/PG for the sake of this thread, also mixed a 5% tester. Vaping it fresh, I'll add to this if anything changes drastically after a week steep.
10%, I'm feeling like this is both too high and not high enough. Dominant lemon, though not quite approaching the level of TFA's. There's definitely other fruit-esque notes in there. I can smell those notes, and the smell is Fruit Loops accurate, but can't pick out the flavors. My guess (hope) is the lemon will fade back after a week's steep and let its companions poke through. Sweetness seems about right, good that it's not over sweetened. I'm not getting any milk at all. The big letdown for me is the exhale. Chemicals, and dry dry dry. Also getting something like cardboard on exhale. It's like they were trying for the cereal element but got the cereal box instead.
Maybe I'd mix it like...
6% CAP Fruit Circles
1%ish
CAP Cereal 27 FLV Crunch Cereal
3% FW Sweet Cream (or something similarly dairy)
1 % FA Meringue
...but I'm wondering if the Fruit Circles will stand up in a mix. Even at 10% it seems pretty...ethereal. Nice thing about TFA's is they got the cereal element right, and it comes through in mixes even at very low sub-furniture polish ratios. CAPs seems to be lacking that cereal grainy texture. Sixstrings952's D.I.Yellos is a good example of how well TFA Fruit Circles can work at low percentage, its cereal and Fruit Loops elements are there even at 1% competing with all the other flavors in it. Based on my test here, I doubt CAPs could even come close as a direct sub in that recipe.
Anyway, ConcreteRiver seems to like it a lot better than I do, so I'll defer-link to his Flavor Guru status:
https://www.reddit.com/r/DIY_eJuice/comments/77bhto/capella_silverline_fruit_circles/