Wow, I only charge $50!! Guess I am underpaid:-) But then again, I don't do this for a living wage. We have no one with in a 2 hour drive (one way) and service machines for our quilt shop customer's convenience and my hobby. If it's making a stitch it's not a timing issue but to help rule out where the problem is: try using different colors on top and in bobbin. I wish machine manufacturers would stop telling people their machines don't need to be oiled. What they are trying to say if "YOu don't have to oil the machine". They want you to take it back to the store to be serviced. But they skipped that part of the message. Good luck!!