Anyone know anything about the Spindle Control from Kosme?

[CptanPanic]

I was browsing the wiki and came upon the circut for a Spindle Speed controller. It includes some schematics and such, but it says it has not been tested. Anyone know if there has been any more development on this?

http://www.shapeoko.com/wiki/index.php/Spindle_Control

[CptanPanic]

FYI: I found this looking around the web. Seems it does the same thing. http://www.inmojo.com/store/inmojo-mark ... er-module/