I believe that you should rethink the designer's intention. The shuddering is normal as there is still a small current going to the motor, which is the way it was designed.
Turning it on and off will lead to much more stress on the electronics and on the motor as I learned with my Logic Tempo which was designed in a similar way. I switched it with a remote controlled wall socket and the motor developed a short within six months.
Turning it on and off will lead to much more stress on the electronics and on the motor as I learned with my Logic Tempo which was designed in a similar way. I switched it with a remote controlled wall socket and the motor developed a short within six months.