Thanks Simon.

I just sanded the back side to grid 4000 and.. I sanded through the tru oil. No damage to the stain, but still, so frustrating. I can not count the amount of coats I put on this thing. Two 88ml bottles!!! Yep, most of it went on to the front because I didn't use a pore filler, but still, what am I doing wrong here? Maaan, I am really this bad at sanding? Geez! Not gonna touch this thing for the rest of the weekend.