Default ABS settings work for me, what are you settings and maybe we can spot a possible issue. Better yet - post a failed print or a description of your issue. I'm printing this tonight in red ABS on my FFCP. The previous versions I printed were pretty good, not perfect since the ABS doesn't bridge well and I didn't have the fan on since I was wary of layer splitting with layers cooling too much. I usually always keep fan off during ABS prints so I haven't experimented further yet to try and improve quality. If it works I'll post my make with settings on my page.