The LC and LC II were among that group of machines that had really bad hardware designs that held them back from achieving their highest potential. The LC line didn't really get into gear until the LC III came out with a motherboard design without compromises. Still, you can swap LC III and Quadra 605 motherboards into earlier cases, so all hope is not lost. You still can't use full height expansion cards, in the flat cases unless you can rotate them onto their side somehow, though.