Hello, Last night, I was attempting to calibrate the Auto guider for the first time, using MaxIm DL with an STT-8300 camera and 8-position filter wheel with internal auto guider (FW8G-STT). The images from the guider (camera 2) were downloading fine, but then went into several minute delays for even a 2 second exposure. Looking at my settings, I couldn’t see what might have caused it. I was going to shut down everything and restart, but clouds moved in. On another note, I tried moving the guide mirror in and out and watched for vignetting, but couldn’t see a difference in the images. There was always a small, darker semicircular area in the primary image whether the pick-off mirror knob was screwed all the way in or all the way out. There is also a thin bright streak on every guide scope image. What might I be doing wrong? I appreciate any help with this.