Hello all, could it be that the “ball heads” (I don’t know the compartment expression) have different diameters? The clamping lever of my ATERA bike carrier went on the trailer coupling at our AtECA to clamp down to the stop. At the present ARONA, the clamping handle can only be pressed down half way. The bicycle carrier is sitting properly on the clutch, the safety marking is good to see. Does anyone have an explanation?