A new nozzle design has been added

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Engine plug

It has been redesigned from the "normal" standard and provides extra support for the lower part of the chamber

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PolarStar F2 V3 AK, Standard FCU 030-kugler A new nozzle design hasThe Polarstar F2 is in theory a Mini Fusion Engine. It offers the same adjustment setting options and performance as the Fusion Engine in a cylinder size. The F2's dual solenoid design provides the same functionality as the legendary Fusion Engine, but in a more compact design. Dual solenoids allow the nozzle and poppet valve to be adjusted independently of each other (just like a Fusion Engine). This allows you to fine tune your unit to your exact