I just want to mention an interesting aspect of the (S)GC related problems with QL-SD. It was reported by QLObi, not sure it was posted here in the forum.
These problems depend on the QL mainboard. The same Gold Card can work perfectly with QL-SD on one QL mainboard, but fail on another QL mainboard.
I still have heard no feedback about this from Aurora users. But my guess is, it will work on Aurora, because the PCB layout offers much better signal quality than the QL.