Ok had some issues with horizontal random noise in images. Turns out it was data transfer errors (read noise). Luka explained this (many thanks) and indeed had a "read time" delay in their ASCOM drivers that delayed the row readout each row. Increasing this fixed the issue.
[s]Having issue getting what looks to be correct debayer from APT fit files in DSS. Kinda red looks green...I may be doing it wrong. Wanted to ask...is the matrix RGGB or GRGB? What camera should I use to debayer in DSS....Nikon D70?[/s]
Damn...how does bulletin board code work...grrr...
Anyway
I figured it out...wrong debayer used Crisis over..use DSS mono camera selected generic camera GRBG...
edit:
You'll need the appropriate cam86 ASCOM driver (mine is 0.7.2L) to do this delay as well as newer firmware (mine at v8L). Many thanks Luka.