I have really tried but can't figure it out. Is it possible that my model is different, and that the cover is not magnetically attached like you say and like they show in the OWC video.
When I feel the top back of the cover, I can't feel any 'lip' (English is not my native language so I'm not exactly sure what you mean). The curved cover is completely smooth and there is no place to get a grip to lift it.
However, I forced a screwdriver in on the right side of the top part, and after some heavy yanking, the cover loosened on the right side. As shown in the attached picture, you can clearly see that a plastic flap was inserted horizontally into a metal 'hole' in the cover itself. This was stopping me from lifting the cover straight up, and the cover had to be yanked to the left to get it out. But as there is really no room to move the cover left or right, it was very hard and I almost broke the plastic flap. Now the cover will not close, because the flap is stopping it, and I can not lift the left side because there is probably a similar flap there. And the cover would have to be moved to he right to unhinge the left flap. But there is no room to move it to the right (or left).
Any other ideas?
P.S. I have built many PCs as well as opened iPods and Mac laptops to change hard drives and optical drives etc. So I'm not entirely clueless about these things. Something does not seem to be right here. The cover is definitely not coming off easily.