This is the compaired pics from Ashford's Spinning wheel's bobbin to the Mach 1 spinning wheel's bobbin. As you can see there is a LARGE difference. Ashfords is way smaller! Mach 1's bobbin can hold anywhere from 8 oz of fiber to so far others have found 10oz of fiber!! This wheel can spin lace weight to VERY chunky art yarn! Why you might ask? Because it has an open orifice!! So no hang ups here! I will edit and post more specific stuff soon. I have to finish how I want it to be written.