I just received the collimating instructions from Russ for the SCD's.
A critical check has just shown that one eyepiece was producing a tiny degree of horizontal error in the right side. this pretty much vanished with a slight rotation of the eyepiece.
i actually think the difference was so small it may not be noticeable.
i suppose considering the potential issues with these .965 inch ep's in adapters, that's a good result.
I'll certainly try to make sure the 16mm zeiss pair are shimmed carefully,although i suspect the longer focal length should help.

Mike