I am having some trouble with the early steps in disassembling my CF-28 and want to ask before I break something! I have removed the 4 screws at the top edge and the two on the rear of the hinge covers. When I try to remove that cover piece (which covers the hinges and the top mounting edge of the keyboard) it does not want to pry loose. I have two knives slipped into either side and have tried to gently pry at the hinge covers and the front edge of the cover piece - between letters - using a small flat screwdriver and it is very resistant. Do I really need to apply more pressure or are there additional screws somewhere on the CF-28 that still need to be removed, please? Thanks!