Ditto--This isn't neurosurgery. One little trick that helps with the screws is after loosening them, leave them in place and put a piece of masking tape over the hole. The screws will then be exactly where they must be, no lost screws and no guessing which hole they go into. The keyboard opens like a book from front to rear, and if if fails to open, this usually means you missed one of the screws. There are lots of them!

Good Luck,

Gary