While we're talking about sleeves, if there's anything you can do to make the sleeves slightly larger, since the ones I get always seem to be slightly smaller than thecoverproject dimensions and covers end up warped a bit inside them or misaligned...
More importantly though, make sure they don't unfasten at the corners so easily, if you can. Putting a new cover in feels like defusing a bomb half the time.
I should just start a "UGC Complaints" thread where we can cover every bad detail about UGCs before Shadowfox makes the new better solution.