I found this video on you tube, my wife took possibly 5 years ago and sorry not Hollywood but hopefully shows the invaluable use
of my Constant Surface Speed attachment.
I fitted to a real Bull Lathe with gear reduction, and advised it can be also compatible for the Sieg type mini lathes.
Just need to be careful with the Sieg that the spindle does not start turning on its own.
This possibility is detailed in the instructions in the Digital hobbyist files created by C Levinski
The lathe since has gone through several more digital age changes, including the RELS, compound slide removed etc.
Hope of interest.
--
John
John Lindo