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    Super73 Z1 - Grintech Baserunner Build/Mod

    I bought an used Super73 Z1 about a year ago ($700 - great deal). It was clear immediately that the 36V system was not going to cut it - not enough power, and not nearly enough range. Thankfully, Rick Cordero (RunPlayBack) put together a phenomenal ‘how to’ video on upgrading the Z1 to 48V...
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