From its FAQ http://www.klipperusa.com/faq.php#anchor530344:
6. Do I have to spend more money and purchase a larger machine for a better
string job?
Since the quality of stringing is exactly the same on all of our
machines, we suggest moving up only if your volume exceeds 6 racquets a day
or more. In our line of stringers you will only save time by purchasing a
more expensive machine. About 5 minutes of stringing time is saved when you
move up to the next higher priced machine. Some of
