Allan
been watching this thread with interest as a QHY9 dark line sufferer like yourself. Have you succeeded in creating an artificial star yet to test the adjustment? If you do then an adjustable pot on the outside will certainly be on the cards for me. Not sure how I will seal it though with thermal expansion and contraction sucking moisture in. Might araldite the back end of the pot into a solid lump although araldite does get old and brittle. Silastic maybe??
Cheers
Stephen
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