We had some CD flying around and wanted a stylish and portable CD rack. We found some cheap metal tool boxes in the local superstore which seemed ideal for this task. So I designed a rack system to stack the CDs neatly in the tool box. The source is an openSCad file where you can account for different box sizes. The CD box I created holds 22 CDs (and two double CDs).Instructions:Buy a cheap tool box with measures at least 20 x 20 x 20 cm. (ex. http://www.d-living.de/Haus_und_Garten/Werkstattausstattung/Werkzeugkoffer_und_Boxen/Brueder_Mannesm...)or find another appropiate case for your CDs. In this case you have to measure your space inside and modify the openSCad file accordingly.When you used a box of the same size we used, you can directly print 4 pieces of the stl file with your 3D printer .We glued the rack into the box with 2 component expoxy resin.