I have been doing my FMQ on my Juki 98TL-Q and Juki 2010 using Isacord 40wt polyester thread. I tired it because I had a bunch and love the colors and shine. Has worked well so far. I was going to restock some colors and a friend with embroidery machine recommended metroemb.com. They carry their own brand of 40wt polyster thread. Prices were really low and I wondered if anyone has tried this brand.