To make sure the second straw is parallel to the first, make a jig (a device that holds component parts in their correct position) that is as wide as the distance you want between the two straws. A two-by-four-inch piece of lumber would work. Align one side of the two-by-four with the glued straw, and glue the second straw aligned with the other edge of the board. Cut two dowels three-quarters of an inch longer that the length of the straw bear- ings. Sand the cut ends and attach one wheel. In most cases the dowel will make a tight fit with the wheel and you won’t.
