I just picked my machine up from the dealer where I had its yearly service done. I'm not too happy that it took 3 weeks instead of the usual 3 days it usually takes. I really am happy with my machine and Janome products in general. Having said that my zigzag stitch on this machine is terrible. I point out when I take it in that when doing a zigzag stitch it tends to form a "channel " or "ridge" down the center of the stitching. This last time I even brought in a sample to show them what I meant. The technician gave me a sample to show the zigzag stitch was now sewing correctly. Today I turned on the machine and sure enough there that darn channel was again. I have tried messing with the tension and stitch /length but I still can't get a nice zigzag stitch. I hate having to drag out my old Janome machine for zigzaging. I tried calling the dealer but was told it could be 3 more weeks to reservice the machine. Does anyone have this problem or a solution????????????