Hi Stefan
I'm no help with your problem but your thread has probably helped clarify some indecision for me.
I was about to buy the ASI120MC-S when your post caught my eye. I'm looking for a guide camera that could also take some reasonable photos and after checking the specs on the ASI224MC it seems to be several levels up in both respects.
My intent is to ease myself into astro imaging with the DSLR gear that I have (see my thread here...
http://www.iceinspace.com.au/forum/s...d.php?t=149859 ) but I just know that a reasonable small 'scope is not too far down the track.
I will be following this thread with interest to see how you fare with the driver issue.
Cheers