For me stacking is not so highly important. Just saving images to a SD card would be nice. Stacking can be done later. Having a 32 gbyte SD card would allow to store about 900 images of 32mbytes. Assuming the exposure time is 6 seconds for unguided images plus a few seconds for downloading. That would allow about 9000 seconds or 2.5 hours exposing. Stacking and filtering of the good and bad images can be done later and better.
For me stacking is not so highly important. Just saving images to a SD card would be nice. Stacking can be done later. Having a 32 gbyte SD card would allow to store about 900 images of 32mbytes. Assuming the exposure time is 6 seconds for unguided images plus a few seconds for downloading. That would allow about 9000 seconds or 2.5 hours exposing. Stacking and filtering of the good and bad images can be done later and better.