skipped this step, didn't take the mobo out and continued from step 21

using a J00 head. no luck at first (that's why i'm here lol) read one comment here saying turn a little bit clockwise and then try to unscrew and that did the trick!

also, held the console with one hand and the screwdriver with the other for applying pressure but not to much or at least to grab the other side of the pressured place instead of letting the hinge press against the table.