Repair of Broken Laptop Hinges and Cracked Top Cover

I have a laptop Acer Extensa 5620 that is still useful for me, but its hinges have broken its plastic cover so that screen is almost separated from rest of computer. Changing plastic cover and hinges is too expensive and I thought cheap solution using parts from hardware store. It works well, but I am sure it can be improved.

Bolt nuts are used to reduce length of screws so that they do not damage components inside computer, but just hold tight enough to the plastic cover

Mechanical part can be found at furniture section of hardware store.