The twin power was really just a gimmick on anything other than a styled pacemaker. The styled pacemaker has a special governor that is linked to the gear selector via a cable. When you put the twin power in the high setting it locks out the gear selector so that you can not put the tractor in gear when the higher rpm is being used. It’s for belt only. The ‘twin power’ on all the later models was just an extra notch on the throttle quadrant. Nice tractor and great video.