I have the SXV H9 and to focus i use a Hartman focuser or also called a Kwik focuser.
Works very very well, stars are round and small, and all is sharp.
Try it, only takes a bout 1 or 2 minutes to focus.
You can make one from carboard or a Pot plant tray like i did for my 14". Only cost me 4 buks.
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