I had the same trouble with the 6600 and upgraded to the 8900. I rarely have problems with it eyelashing on the 8900. I tried the single hole plate, the blue bobbin, different needles, different threads. Some of it was probably operator error but I tried FMQing the same project on both machines when we bought the 8900 and you could definitely tell which machine did which section. My best advice is to just keep practicing and slow your hands down as you're moving the fabric. Hopefully that will help.