I have the Juki 98 Q on a Grace GMC Pro frame, I have one problem I can't seem to get the top tension correct, my thread keeps breaking, If I set it a 1 then I get the loopies and at 2 seems to break the thread. I'm using 50/3 cotton and 18 needle. The tension goes from 1-4 only and seems very tight at 2 and with the foot down you can't even pull the thread through the needle. Did I get a Lemon??