The advanced #2 video referenced above puts grease all over the BG and youll need to fix that later when coffee gets in the grease.

The ONLY PLACE you need to lubricate is around these yellow circles. They are the only places that drag AND DONT USE TOO MUCH. Here is how: Look for the small "dig-out" gap in the circle, push grease in there. Then moosh grease on rest of the circle, ONLY WHERE THE YELLOW MEETS THE BLACK. Move the device back and forth like in video #2 at 16:00.