Axiom Simon Line Prototype Neutron BalanceNumbers: 5 4 0 3 A prototype version of the first midrange in the Simon Line, the Prototype Simon Line Balance is exclusively available in 2024s GYROpalooza box! Intended to be a midpoint between the Reactor and Pyro, the prototype run wound up having a more overstable flight than wed hoped. To get that ideal flight, the decision was made to go back to the drawing board and fully retool the mold for its eventual stock release.