Eurorack DIY Behringer 150 PLUS System-H 921 VCOs Ge0sync TB-EFA Module Maffez D3MIX (DeMix) Model A (BA662 VCA) Model A+ (BA662 VCA) Model F (AS3109 VCF) Model Y (SY-VCO) Mutable Instruments Ripples Pharmasonic Sy-Core Nalasound Look of approval