How do you open a Yamaha kx88 midi controller? I took off the four screws on the top and i wd40'ed the hinges but when i tried to lift the keyboard up from the felt backwards. the hinges where on the back it only kind of lifted up. Is it just not openinig because its old? Also the plastic part where the pitch wheel and this other plastic part all the way on the other side kind of lifted up with the top part. I wanted to clean the contacts and get rid of dust. I will probably replace the felt as well.