If you have ever strung a fishing rod, you know what a pain it can be to keep the line coming off of the spool correctly. The easiest way to cure this problem is to use a manual string winder.
Cut the 2-by-6 to 12 inches in length. Drill directly in the centre of the board and countersink one side, creating a space wide enough and deep enough to accommodate one washer and the head of the bolt, which should be small enough to fit through the spool of line.
Run the bolt through one washer and insert through the countersunk side of the board.
Slip another washer over the bolt followed by a nut. Tighten down with a wrench.
Slide the spool over the bolt and screw a second nut onto the bolt to secure the spool, leaving enough room for it to spin freely.
When choosing a bolt, be sure that it will fit all of the spools that you use.