Who has one? I just got mine a week or so ago,but I am having trouble with the thread cutter. It often cuts the top thread too short and it comes un threaded. I dont understand the numbers on the tension.If I adjust it so the thread doesnt cut too short,my thread is loose and floppy coming down through the thread guides.The maual doesnt address this issue. Would appreciate any hints on this machine from anyone who owns one. I love it,it quilts like butter,but Imstill tweaking the tension,etc.