Jeff, I’ve been using around 2% flaked barley in pale beers for about a year FWIW. It contributes to good foam with little impact on flavor at that %. I definitely don’t see chit as any improvement on that and it’s tougher to source than flaked barley.
To finish the story, I bought a few lbs of chit from Brew Brothers last year and have tried both. When the chit runs out I’ll just switch to flaked barley.