I received my CAA yesterday and attempted to install it. The instructions say that if my telescope has a field flattener I should mount the CAA between the flattener and the telescope. I have an Askar 103 APO that requires a field flattener but the threads on the telescope side of the flattener are something like 75mm and it is not possible to mount the CAA to it. I tried attaching the CAA to the rear (camera) end of the flattener, with the ZWO filter drawer immediately in front of the ASI2600MC Pro. I made an exposure with this setup but there is a noticeable circular region that is lighter in brightness than the rest of the image. I also noticed that the focus tube draw was around 70mm rather than the normal draw of 37mm. 
. I'm not sure if this related but I could not get my autoguiding lower than 2.5. Thank you.
