Thanks for the reply John.
You'd need to use the one that comes with the 9.25 to understand. It's not absolutely rubbish, but not far off
Big thick crosshairs which make it not ideal for lining objects up for imaging. Also a really bad rubber o ring which I'm still confused about. I know it's meant to sit under one of the finder holder rings and provide some resistance for when you're using the nylon set screw adjuster rings, but I can't figure it out for the life of me!
It's also not very nice to look through. A ton of coma etc
Just considering options