We construct the first explicit two-scale non-polynomial kinetic function (S3) that simultaneously reproduces the observed boost at a₀ (1. 579 vs 1. 582), passes Cassini (KX = 1. 000 at Saturn), and achieves the correct asymptotic RAR slope (s -> 0. 52). However, the predicted slope at a₀ is 0. 86 vs observed ~0. 6. We trace this to the additive structure KX = 1 + f (X) inherent to conformal QS coupling, identifying it as the remaining obstruction.
Arturo Cerezo (Mon,) studied this question.