Thank you Nancy we had a great Thanksgiviing. I only use 206x13 needles but I did try 15x1 and it worked with no problem. I read on the net somewhere about the 15x1 in the 319 and it said it would work so I tried and it did. I wish I could remember where I read it. When I first put the 15x1 I turn the wheel by hand really slow to make sure it would work. Although I am not comfortable with the15x1 and will cont. to use 206x13. I can't see why the 80/20 would cause skipping stitches. I usually follow the instructions in the manual. I must be lucky so far no problems with my machine yet. I am really learning on this machine to.