We encourage you to customize the enclosure to fit your project. Maybe you don't want to use magnets and would rather use machine screws all the way through. Our original solids were created in AutoDesk 123D Design and are available to modify, edit and download.
123D Design is an easy to use, free CAD software from Autodesk, that is avilable in most platforms. It has an intutive interface and powerful features that are optimized for designing parts for 3d printing. There are plently of tutorial videos on youtube and we have a great list on our blog, everything from learning the interface to using the features.
Open source design means you're totally free to use whatever components you can find. We recommend using our components because we can offer support if an item is damanged or broken.