This thread is interesting because my 6600 is not this fussy when it comes to FMQ. I change the foot, set stitch length to zero, slow my speed down, and loosen the presser foot and that's all. I don't drop my feed dogs and I don't usually fiddle with tension at all. I don't have the blue dot bobbin case either. I do get this same eyelash problem sometimes - for me it's either moving too quickly or my bobbin isn't threaded right. Strange how the same machine can behave so differently! Maybe I keep my tension looser in general? I can't remember what it's set to right now, I rarely change it.
I use teflon baking mats in place of a Supreme Slider. They cost about 1/8th the price - I bought enough to cover most of my sewing surface for less than a single Queen size Supreme Slider. They aren't self-sticky so I taped them down with Gorilla tape. They work wonders for managing a quilt! They're black, so not as nice looking as a Supreme Slider, but for me that wasn't an issue. I cut a square into one so I can remove my needle plate without having to un-tape my "sliders". I tried just cutting space for the bobbin door but the edges kept catching fabric, so I cut a larger square and taped around it - works great!
These are the ones I bought:
http://www.amazon.com/LARGE-Teflon-O...lon+baking+mat