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There are two pieces left of the border you zoomed in on on the lower setting. Can you do them again with highest magnification (how much can your scope handle ?)

Your USB close-up photos are too small , you need them twice as big. Also play with the sharpness and light. Best full led light.
I see this a lot with people buying a scope that the quality is...

I think the lack of replies is an answer to your question. There is just nothing left to make an assessment on.