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I always find it difficult to centre an object on the crosshair. It's a hit n miss affair - turning screws back n forth, often running out of thread.
My Celestron finder has 2 plastic screws and a metal springed lug (instead of 3rd screw). Yours is the same?
I use a Telrad but the finder scope is still useful. I keep thinking to get different one or get a different holder.
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