I have a home made touch n flow that was made by one of the local club members using a ink tube from a disposible pen, a syringe needle and some epoxy, works quite well actually. The TnF should work on the same principle. What I do is simply put the tube directly in my liquid cement (in this case Tenax 7R since it has a tall skinny bottle) and let the capillary action draw the Tenax directly into the tube. It should draw in enough to do a 6 inch seam each time. Just be sure to let all the tenax run out before you put it away, it will pretty much just wick away if you draw the needle over some paper or card stock.