When building this kit, a case with a minimum length of 60 cm is needed as the focal point of the two fresnel lenses is 30 cm. Building a rectangular box obviously was the easiest option. But the entire point of this kit is to be usefull for a long time, as it is compatible with almost all laptops. Therefore investing some more time into a beautifull case is worth the extra time. 

I opted for using an old Fairchild 930d I found in a dumpster. This super 8 mm 'projector' adds a nostalgic look to the kit. Because it's only about 40 cm long, I decided to a flexible bellow for the extra 20 cm. This bellow resembles that of an old box camera, also very suitable for a projector kit. By making this bellow retractable the entire kit becomes more portable when not using it.