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I would almost say don't get the $29 cheshire unless it is for an 8". My cheshire compared to other longer varieties performed very poorly
I got the $29 cheshire, the wire that forms the cross hairs is not taut, and for secondary collimation (you must do this first before the primary mirror), it is not long enough.
i am going to get a longer sight tube / cheshire and maybe a laser.
I would recommend spending a little more in this area. Steve H had a very good one, so I will check where he bought his!
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