the KOPROPO 2367, 2368 and 2386 servos can work unregulated, but there is a caveat there, according to KO, they will work fine, in fact with higher torque and faster speeds, however, they warn the user that if you use these servos with unregulated lipos then you risk shortening the life of the motor, so basically its the user's call, if he wants better performance but not lasting equipment, then go unregulated with these servos, but for longevity, use a regulator. hope this helps.
