Millennium’s history with Innova shows in its plastics. Quantum is the clear premium in the same class as Champion; Sirius the grippy opaque; Millennium Standard the original premium blend, now the mid tier. Quantum Zero-G is the air-injected lightweight, Lunar the glow.
The baselines are Delta-T (firm), ET (tacky), and SuperSoft for putters. Two entries here, Frontline-X and Recon, are Hyzerbomb plastics that Millennium moulds, and they’ll move once Hyzerbomb has its own place.