Recommend a Servo?

I have a Redboard Photon and am creating an “analog-digital” thermometer. In other words, the photon will receive a temperature every 10 minutes, and then turn the servo which will point to the temperature. The pointer is just the straight portion of a hangar that I cut. I had an analog servo; however, it wasn’t accurate. I want it to be accurate to the degree. I then bought a digital servo (Hi-Tec HS-5065MG); however, the load of the hangar makes it buzz. I am powering the servo through the Redboard - it works; however, might that be contributing to the buzz?

How can I do this so I have an accurate, non-buzzing servo?

Thank you,

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