Namely the large conicals, but even the "semi-titan grinders would show dramatic improvement (such as the Mahlkonig K30, Compak K8, Mazzer Major, Mazzer SJ, Versalab M3, etc.) But unless you strongly prefer the flavor profile of flat burrs, and especially since you weigh per dose, something like a K10 or a Versalab (if he is your sort of thing) would be ideal for you, IMO. So an upgrade to a lar