I ordered this from Discovery June 2003 for a 10 inch PDHQ.
It may fit other diameter PDHQ scopes. This kit will permit you to install your encoders/cables/DSCcomputer on your scope with minimal changes to the original equipment. All you need to supply is some locktight.
I installed a set on my scope and used the sky commander .Sweet.
This is an unused set Discovery wouldn't ship for months and Helix got me the set in a week ! Both arrived within a day or so. Went to a star party and put it on the shelf. Never shipped it back. Found it when I did some winter cleaning. My bad memory your gain.
Was $69 + $6 ==> Now $50 shipping included (interesting trades considered )
Thanks for looking, John
Now where was that big long white thing with AP on the side of it?