Hi I have an unused (by me) Dave Eck DSC box with 4000tic encoders (2).
I never really got this going, and am now getting an Argo Navis so I won't be using it.
This was bought 2nd hand from Martin (Mill) and demonstrated to me at his house. In fact
I believe they are the ones in this article.
Unfortunately I won't be able to demo it as I never got it going due to my own incompetence
I'll throw in the mounting bits and pieces that my (far more competent) father hand made for me, to fit on my GSO dob.
$85 for a cheap DSC that will interface to Starry Night, etc. and tell you where to find the wonders of the night sky!
Can post, or pickup from Melbourne SE subs.
PS: Will post pics soon.