Every robot builder will need to hack a servo for continous rotation sooner or later. Fortunately, there are a few tutorials on the web that can save you a lot of time when the need arises. The Seattle Robotics Society offers a basic tutorial for hacking Futaba S-148 servos. Kevin Ross of PARTS offers another way to hack the Futaba S-148 that should work on most generic servos while fellow PARTS member Daryl Sandberg provides yet another Futaba S-148 hack that he warns may not work for non-Futaba servos. Our own Swirling Brain has written a nice tutorial for hacking the Sub-Micro Cirrus CS-21 Servo. Finally, Mondo-tronics provides a useful hack for the HiTech HS-300 servo. All these hacks will void the servo warranty and are usually irreversible... but that's what makes it fun, right?