Have you ever used Joann Fabric's Speedstix? I haven't so I'm not sure how good they'll be, but they're a size 50

Most of the patterns call for you to knit them with 2-4 strands at a time.
http://www.joann.com/joann/catalog.j...ODID=xprd73891
http://www.joann.com/joann/catalog.j...ODID=xprd73728
Hope that helps!! With size 50's an afghan should knit up in no time!
