I've got a Lucky Blitz chip in mine and it's very good- less modes, but very simple to use and allows you to use force feed without draining batteries, plus a push on the button chucks the wheel back a quarter turn and clears jams very well if the automatic anti-jam hasnt already done it. At 15bps the stock chip on setting 1 does a great job but anything over that is hell on batteries as the motor is used to provide constant pressure on the ball stack. The Blitz chip has settings that give two seconds of pressure after the end of a burst then stops, much easier on battery life and still very quick.