Copies of documentation from Rick Sparber's site - http://rick.sparber.org/sh.htm
The Unofficial Shumatech DRO-550 Application Notes for the Mill, Version 2.0 - November 25, 2009
ShumaTech DRO-550 Application Notes for the Mill, Version 1.0.2 By Rick. G. Sparber, August 9, 2009
The Unofficial User's Guide to the Shumatech DRO-550
Electrical Noise and the Chinese Scale/Shumatech DRO Interface - June 27, 2007
The Unofficial DPU-550 Hardware Installation Guide Version 2.0 - November 25, 2009
The Unofficial Guide to Installing Software on the Shumatech DRO-550 Version 2.0 - November 25, 2009