The invention involves collective management of video and audio content in a content provider. The precursors typically are particles of nickel, cobalt, and manganese mixed metal oxidized hydroxides with varying metal molar ratios prepared in co-precipitation reactions in two sequential reactors. The optical blending zone has a surface that ensures a smooth surface transition from the first optical zone to the second optical zone and that allows the first and second optical zone to be designed independently and optimally so that ghost images or blur from the transition between the first and second optical zones can be minimized or eliminated. This prevents the following: a reverse torque is transmitted to the center hub; a torque limiter wrongly acts; a fastening part between a shaft and the center hub loosens; or abnormal noise or aversive vibration takes place. The web is received directly on the separating device or on a fabric wrapped about the separating device.