I have an Intermatic T101P3 timer running my 120V 12amp 1HP single speed pump. I am contemplating replacing it with a Pentair 120V 1 HP dual speed pump. I know that the T106m can be added on to the T104 for a 220Volt pump, but can't seem to find what to add to the T101 to run a 120V 2 speed. What do you recommend?