I have the Singer Futura CE250. I can use the xxx format is what the machine calls for but when I get designs from embroidery library they don't have the xxx so I get the hus format. I don't change it or worry about having to make it a different format. I use the hus format and it sews out great. I bought my Ce250 from HSN a little over 3 yrs ago and I just love it! I have used it a whole lot for towels, tshirts, baby blankets and you can see my unicorn quilt I will send in with this email. Some of you may have already seen it.