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The main problem with the GSO RC is that it's difficult to collimate; both mirrors have to be lined up on the same optical axis, they both have collimation screws and the separation between them is critical. Collimation of the SCT is a doddle by comparison, but the SCT is harder to cool.
It seems that every consumer level scope has issues of one kind or another and you need to be confident you can deal with the problems of a particular design.
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