Archive: https://archive.today/Ng2IO From the post: >>I know of at least two successful attempts to implement a similar technique. One was accomplished about 15 years ago by argon Instructables user. Another attempt was made by a user with nickname [unDEFER] (no English documentation unfortunately). These two projects inspired me some time ago. And in fact my coordinate conversion code is mostly based on [unDEFER]’s implementation. I also used geometric parameters of some compact discs from that project. I acknowledge and am grateful to these developers for their contributions.