I am often sleeve my cards and it looks like this inset will allow it. Looking through the forums it appears that the insert will fit sleeved cards with the exception of the mini cards for the twist decks and focus cards--is this correct?
"If trees could scream, would we be so cavalier about cutting them down? We might, if they screamed all the time, for no good reason." -Jack Handey
This has been my experience. The standard size card wells easily accommodate sleeves. The mini card well doesn't fit the sleeves I use and I would think there aren't sleeves snug enough to work, though one never knows.