I am at my whits end! I have had my Mega Quilter since 2006 but have not had as many issues as I have had lately. I do not have it on a frame - sits on a my sewing table. I can not seem to get that tension where it should be. The top thread looks perfect - the bottom does not. When I tighten the tension, the bottom gets better but the thread keeps breaking. I have no issues with the walking foot and straight stitch - it appears to only be when free motion quilting. I had it cleaned last week, I oil it often and have not changed the type of thread - seems to always like the 40wts. I did today try a 70 needle as opposed to the 90 but the bottom stitch is just not where it should be. Any ideas?