The Curve Master Presser Foot is a new sewing technology that allows us to sew any 1/4"" curved seam without pinning!
It also does perfect straight seams.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=380274596530
Instruction
http://siterepository.s3.amazonaws.com/00311201003061141458535.pdf
Video
http://justcurves.wordpress.com/2010/03/19/day-2-as-a-blogger/
Fits all NEW STYLE models: Artista, Aurora, Activa, and Virtuosa.