I have a question for any sewing machine technicians or people who maybe repair there own machines. I have a Janome DC3018. I took it in to have it cleaned and serviced in October. I was sewing at a retreat the next weekend and it started squeaking, then it started clunking. If I sew fast it sounds almost like a machine gun. I took it back and of course it didn't squeak or clunk the technician checked it out again but couldn't find anything. It usually starts out ok but then gets louder the more I sew. The stitch is fine. If any of you have any suggestions or ideas I'd really appreciate you input.