Well folks.....after having sewn on a Viking SE and now my new Bernina 570 both of which have 9mm feed dogs and really struggling to get that nice 1/4 inch seam and to sew triangles together even with a straight stitch plate, or moving the needle to the right. and using the dual feed or walking foot.....I am so, so, so glad I still have my ancient Viking D1 ;and also picked up the Bernina red machine (both have the old 5mm feed dogs. Today I am pulling out my old D1 and if it is working will use that to finish the piecing of my current quilting project.....I still have the cabinet insert for that one....if my D1 has ceased to function, I will use the Bernina Red Machine although I do not have an insert as yet for that one...I am tired of the gyrations I have to go through to get a decent 1/4 inch seam...with the 5 mm machines....just got to pick up the fabric and go....easy, peasy.