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Replacing a blown US Sega Saturn power supply with a picoPSU so that it will work on 240 volts

Sega Saturn PSU Replacement
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AV mod for the Sega Master System 2 to get better video quality than the built in RF using a custom PCB. Also a 50/60hz mod

Master System 2 AV Mod
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A comparison of the 3D Glasses adapter for the Sega Mark III and the Sega Master System

Sega Mark III 3D Adapter