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No worries John!
It's a pain when you need to test and the weather is crap! (excuse my French)
When your weather improves, go back to the imaging train without the reducer, then crank up CCD Inspector and see how the collimation looks... that is if you're finding there is some non evenness to the distortion to the corners. But better to get things good before tracking down other issues.
I used some plastic washers made from old Tupperware containers to give me a couple of mm's of spacing to add to the train while testing... this then got me to a ball park distance. I then could work out what I needed in the way of extension rings that would fit the bill.
Don't worry, you'll get it. I've read quite a few post around the place with folk having the same issues with reducer/ corrector.
All ended well!
Keep us posted on how you get on.
All the best
Rich
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