Thoughts about double needle sewing machines Hi Sander, I've had my shop for around 40 years and like you always did my French seams on a single needle machine. About two years ago I came across a "generic" Juki double needle machine on Ebay for around $1500 and thought " why not"? So I bit the bullet and because I do a lot of aircraft upholstery and most all use leather, I really use this machine a lot. I'll never look back. It makes my job quicker and more precise. If there is a draw back (other than the original price) it would be that you generally have to buy two spools of each color of thread that you use. Also, if you need color coded bobbins, you have to load two of those as well. A little more time but still worth it IMHO.