Finally been able to get the system out under the stars !
from a mechanics point of view everything worked Ok but when I came to processionals the data I found an issue with the saved images from the SBIG.
all files were collected in a batch mode through ekos with all default settings. The system is running on rPI3b+ on ubuntu mate with v1.7.
Many of the files which have been collected have a column size of 3550 while others seem to have a column size of 3551. the FITS header says that they are the same size by processing software fails due to the image size being different by a single column.
I am not sure if this is an error within the driver or within Ekos itself.
I see this problem from time to time as well. I don’t know what the root cause is. You can increase the size or crop the affected images. The most annoying thing is you need to be aligned with your darks.
Here’s a thread that mentions a similar issue although it seems it was fixed: