Alex Andreani said:
Got sold used Meade 10" SCT
, image fuzzy, can't quit focus, can I collimate this myself, or do I need to send it in?
Collimate it yourself. There are numerous sets of good instructions on the web, but basically, you observe the diffraction rings of a centered, slightly defocused star and collimate until the rings are concentric.
Time on your hands?
Waste it with Uncle Rod's Astro Blog!