I think you are talking about doing ruler work on a DSM. I BROUGHT THE FOOT for my janome 8900. it is free motion feet for the 1600. It will attack to my foot holder for free motion sewing. It come with 2 attachment. One of the attachment is 1/4 inch high. Then I brought HANDI VERSA TOOL which is a ruler used by long arm quilter. This is 1/4 inch high. has different sharps. [straight and curves] the foot was $19.00 and the ruler was $24.95 minus 15 % for using my Janome dealer. The only drawback I see is that I have to change feet with my foot holder. I got it 3 days ago and have not try it yet. Will let you know how it works.