Ugh, just got mine and I'm in the same boat. I'm missing parts E (hydraulic post), F (post cover), J, K, L, & M (bolts and washers), and N the hex wrench. I got a box with half a chair cluttering up office space. Oh, and I have a second one due to arrive tomorrow. I hope it's complete. It's too bad. I have Arozzi's gaming desk, and it's great.