So sorry we couldn't help you get it fixed. What a disappointment. It is odd though, if the hole for the cone is too far forward, why did it sew ok for a while! Man, I would be tearing my hair out by now. So, take a deep breath, and call your dealer first thing in the AM. I know you won't be able to get there, but I always feel better when I call, cause I feel like I was able to do something toward a solution. I am sure your dealer will get this sorted out. But I totally understand your frustration and annoyance. You are entitled. I am glad that the machine works ok with the regular foot though. That even makes it seem more likely that the foot is the culprit.