To see more of what's on the discs and how to use them, look at this video: [[video: https://www.youtube.com/watch?v=c_u68EQHTr0]] [[video: https://www.youtube.com/watch?v=CNu6NP8wsgw]] Conclusion: they work. Play this video for a demonstration: [[video: https://www.youtube.com/watch?v=8BiWFf03WCU]] [[video: https://www.youtube.com/watch?v=GdeZh4BFOUQ]]