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Um, hadn't considered the mirror exposed angle, so if you have to then hang in there with the refractor. I have a used 80mm apo triplet, and while it isn't much chop for galaxies, it is a very forgiving.
Start small/insignificant and go from there. Phil has an ED80 in the For/Sales.
With respect to the bigger achros, I can't really say, but suspect the old axiom exists, you get what you pay for. Can't hurt to try it though, I have been thinking of this myself.
Gary
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