I just got a Juki 2010 today and ordered a grace frame for FMQ. I am so excited but also can't waste anymore money:P so I wanted to get some expert advice on what thread works best. I saw on connecting threads they have a pretty good price on cotton thread with a great color selection. But I have heard (and read) that poly thread is recommended. Some books say cotton only but others sources say either is fine. But which has worked better for you?