There are many examples of cheap self-build robotic systems (basically robotic CD changers). E.g.: https://hackaday.com/tag/cd-changer/ https://hackaday.com/ta

There are many examples of cheap self-build robotic systems (basically robotic CD changers). E.g.: https://hackaday.com/tag/cd-changer/ https://hackaday.com/tag/cd-changer/ http://hackalizer.com/jack-the-ripper-is-an-automated-diy-disc-changer/ http://hackalizer.com/jack-the-ripper-is-an-automated-diy-di... http://hackedgadgets.com/2006/06/07/cd-changing-lego-robot/ http://hackedgadgets.com/2006/06/07/cd-changing-lego-robot/ Yes, you definitely want sth like that. And further extend it.