[Cluster]

I now have an Orion cheshire/sight tube and tried collimating according to the written instructions.

The diagrams don't match what I see. The edge of the secondary mirror is centered but the primary mirror reflection takes up the entire area of the secondary. There is no nice black border on the secondary with the primary's clips visible. I have to tilt the secondary a long way to see a mirror clip.

The cheshire's annulus reflection cannot be centered. I can get the reflected crosshairs centered in the annulus and primary center dot reflection, but the whole thing is offset to the left. I even tried shimming the focuser and while it did improve the situation, I had to shim so far that it just felt wrong and I gave up.

The spider appears to be centered but it's a little hard to measure.

I'll give it a rest for now (probably just making things worse) and wait until Sunday. A visual inspection by experienced users will hopefully work out the problem. It's cloudy and windy outside so I can't my telescope out for a test anyway.