Lynx

Depends on what you need it for. If the servo's are being run on the same control surface a 'matchbox' is a good idea to keep the surface from being put under too much stress from the differential torque the servo's create because they go to the same position at slightly different times. It's critical with digital servo's because they have higher low end torque and it can break the control surface and just generally wastes energy fighting the other servo.