Cheshire collimator bent crosshairs

[greenery]

Hi guys

Just took delivery of this item for my just acquired 8 inch StellaLyra dob. Not tried to use yet. One of the 2 wires forming the crosshairs is bowed so they presumably don't intersect in the centre of the tube. How much of an issue is this? Should I try to fix it or return or use as is? I'm hoping for an acceptable solution soon as aiming to use the scope at Christmas. I'll be using the astrobaby collimation guide.

TIA

Edited December 19, 2023 by greenery
Spelling

[Spile]

Definitely sent it back for a replacement 

[Peter Drew]

Use it to check your collimation and then send it back.     🙂

[Carbon Brush]

Have you had a chance to use the scope yet?
Collimation is sometimes over - thought.
It may be good enough out the box.

[Captain Scarlet]

You only use those crosshairs to aim the centreline of the Cheshire at the centre-spot of the mirror, I.e. collimating the eyepiece/focuser tube to the primary. Even if bent you should be able to estimate where the proper crosshair centre should be. For the primary, they don’t come into it: you use the reflection of the angled-illuminated face, which might have its own cross-etchings: you line that up also with the primary’s centre-spot using the primary’s adjustment screws.

I’d still return it, though.

Cheers, Magnus

Edited December 21, 2023 by Captain Scarlet

[greenery]

Thanks guys. Not used the scope yet as not building base till I've travelled for Xmas. Have got a replacement collimator.