This product does not assemble correctly.  I work for Wayfair, and I would not recommend buying from this supplier.  Many things dont line up, or fit togerther properly.  I bought this for myself and it didnt work, so I ordered a replacement, and it was the same case... If you DO decide to take a chance and buy this, if at Step 3 the piece isnt flush against the desk frame, I would just call and return it without wasting hours of your time.  Really nice material, it just isn't built and cut properly. Sad...