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Peter,
I'm surprised you have a x0.63 Meade reducer with a focal length of 145mm...
There was "one bad batch" produced to my knowledge before it was corrected and the focal length reverted to the 220mm.
I had two or three reducers (both Meade and Celestron) over the years - not much to choose between them.
The current x0.63 reducers are all 220mm focal length.
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