I have had this machine since the beginning of the year. Everything was fine until a couple of nights ago. I finished a quilt, had the quilt foot on and the feed dog lowered, now the feed dog won't raise!(it has a switch in back to move it). The machine is currently taken apart on my kitchen table about to be put back together again because I give up. It still won't raise. I should't say wont raise, but barely raises. I would really like to fix it myself 1. because I am a "fix it" type of lady and 2. The shop has a 2+ week turn-a-round, and on something that is probably stupid, I don't want to wait. Everything is spotless inside, oiled and wonderful. It still sews if I want to feed it manually. Any ideas?