Update: For anyone else that has an XP7240, the top comes off by gently levering up from the back edge (after you've removed all 5 retaining screws, of course). After that, it was relatively easy to increase the fineness of the grind and it has improved the coffee 100%. Krups are doing themselves a great disservice by delivering a machine with incorrect grind setting and compounding that by making it so hard to fix the error.