Hi Patrick,

I have a CEM40 and have not noticed any calibration problems like you mention (I have been using the latest indi upgrade with modification to the ASI driver . A quick experiment to see if it is related to indi updates is to see if PhD2 shows the same problem. I suspect that it may be mount related. I have had some recent guiding issues related to sudden and repeated loss of guide star SNR. This was related to loss if image from the guide camera which was being routed through the mount USB. Routing through the main camera USB hub resolved the problem.

Cheers
Mike

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