I'm trying tubes (black Mickey Mouse Q-tips, with fuz scraped off) using a large sewing needle as a mandrel. I tied an 1/8th to 1/4 inch section with thread until the tube was tight when slid over the needle. Tube is slightly bigger than needle. Wife suggested i take a tube to the fabric store and try knitting needles, as apparently the come in all sizes. I think (for 100 "tubes" and the needle) I'm in it about $5.