A custom plexiglas case is always good, the size of the Beige G3's MLB lets you have some fun in the final shape / design of the case. More so if you get some small form factor PC components to replace some of Apple's stock stuff. If I ever get back to it I was making a geodesic dome out of plexi to house my project beige G3. Really ought to get back to that one come to think of it...