The stock plastic shaft cup on the FT009/016 is NOT a standard cup. It is plastic and can break if you upgrade to a larger prop or a faster motor. You cannot buy this shaft cup as a replacement part alone. Therefore, you either need to 3d print on your own ( https://upgradeparts.com/2021/08/13/replacement-shaft-cup-for-ft009/ ), or … Continue reading Replacing broken shaft cup on a FT009/016 RC boat