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Don't be shy - adjust one of the primary mirror collimation (tilt) screws a little - say half a turn (monitor which way so you can restore it) and see what happens to the image. Better? Worse? no change? You'll be learning. But invest in some collimation tools soon. If nothing else, try the 35mm film container with a hole drilled in the centre of the end, or cap. That will fit into the 1.25" holder and allow you to better centre your viewing eye on the optical axis of the focusser.
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