Gregouser shows how to disassembly the Polarstar Airsoft Kythera HPA engine for owners who want to do their maintenance or just curious what is inside. PolarStar's Kythera is a mechanical HPA system that does not need any battery or electronics, making it simple, reliable, and waterproof. Inspired by the Antikythera Mechanism, an ancient Greek device that tracked the Solar System with astonishing precision, the Kythera valve mechanism is a smart and innovative design that can work with different types of triggers and fire modes. The first product in this line is the Kythera SA, which is compatible with AEG gearboxes and offers semi-automatic shooting.