M3A3 Quad 20mm Flak

This is a Yugoslavian M3A3 Quad 20mm Flak, exact designation unknown to me, anybody else know? Some of the 56 M3A3's supplied to Marshal Tito had their turrets removed and mounted captured German Quad 20mm's. My conversion started with he Tamiya M5A1 Stuart and the Kirin M3A3 resin upper hull detailed with a Eduard PE. It was built with the aid of the FSM article (April 1996). The rear hull stowage box, fenders, and other small fittings were scratchbuilt.