Hello all, Once again, I was visiting one of my customers on Friday with a machine issue and one of the issues we addressed was the type of bobbin they were using. The recommended bobbin for the Amaya, and all other machines if you ask me, is a "Polyester V-15, size L" (for large). Not the cheaper version named "Astra". The Astra bobbin is a spun polyester and not a "mono-filament" bobbin like the "Polyester" bobbin. If you compare the two, to the naked eye, the polyester bobbin is smooth and consistent and doesn't look very much different than the thread used on top of the machine. The astra bobbin looks more like hemp rope and is kind of hairy looking. Sure the astra bobbins are a few dollars cheaper but by all means, don't pinch your pennies here. A smooth mono-filament bobbin with less lint will give a more consistent tension which is vital to correct operation of the Amaya. Most folks I run across who don't know the difference tell me, "that's what they sent me in the beginning so that's what I always order". You can use either of the two but I would suggest the better of the two.. "Polyester V-15, size L". Good Luck, Ed Ed & Maralien Orantes E.M. Broidery 900 Terry Parkway, Ste. 200 New Orleans, La. 70056 504-EMBROID ery (504-362-7643)