Engineering change. As problems show up during production manufacturers change the board layout, change parts on the board, or add jumpers. Changes are generally reflected in a label on the board. For example "XXXXXX-YYY" with the X being a part number and the Y being a change level.
Breaking the platters loose from the heads was a matter of rotating the entire drive in one hand, on the same plane as the platters, stopping the rotation against the heel of the other hand, and letting the inertial of the platters break the head seal. This was a problem with platter lubricant early on but really shouldn't be a problem with your drive as the heads are lighter with current construction. But you can try the solution. It won't hurt anything.
Ed Fair
Give the wrong symptoms, get the wrong solutions.