Just push the tube up to the jig head - not over it. Some use a drop of super glue to keep it there, but I don't have trouble with it staying without glue. If you want the tube over the jig head - you should put the jig head inside the tube from the rear - poking the jig eye out the front of the tube - then tie on the line. The issue with this method is changing tubes - you have to cut off, insert tube, and re-tie.