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gbj_tester
It seems like Avio are out of business now? CAlibrating with a 10kg weight will not be accurate at all. A home gym weight could easily have 2% error, you are only calibrating in one orientation (horizontal crank), you are calibrating with around 10% of your expected values so any error in calibration will be magnified at higher forces... I wouldn't trust that device to give accurate power numbers.