I dug around the closet and found my old Audigy 2 ZS card (Inoperative), and checked it against the space available in the case, and it fits like a glove. The only problem that I now see is that I can't seem to be able to remove the external slot cover. Unlike a regular case in which they are held by a single screw, this has no screws. the top is held in place with a sort of clip, and the bottom has an odd tab which fits through the slot, sandwiching the case between it and the inside portion. I tried to pry one off with a screw driver, but it will not be easy. The screwdriver slipped and the point hit the motherboard (don't see any damage), so I'm going to proceed more cautionly. Even after it's removed, it leave the question of how to secure the sound card to the slot, because I see no screw hole on top, and even more of a problem, the mounting plate on all the sound cards that I know about do not have that extra tab I mentioned. Normally the bottom is just placed between the edge of the motherboard and the case, but the motherboard doesn come very close to the back of the case, so that wouldn't work. Can some special plate be purchased to replace the one that comes on the cards?