Originally Posted by
jul12
I use mainly Isacord, but my 8900 quilts beautifully with all threads I have used on it - Aurifil, Masterpiece, YLI Soft Touch, Mettler Silk Finish, King Tut, Bottom Line - and fantastic results with Superior Metallics.
I always use same top & bottom, except K.Tut and Metallics I have Bottom Line in bobbin.
My reply would be much like jul12, and I would add to the list So Fine and Aurifil nylon monofilament. I have an 8900 and it just isn't fussy. I don't always use the same thread in the top & bottom, but you might have to play with the tension. I use the blue dot bobbin case for FMQ, but not SID. Good Luck. You are going to have so much fun.