Hello Ryan

Maybe one possible approach to achieve the desired behavior is to set property :
ultraGauge1.Enabled = false;
By this way the users could not be able to change manualy the dial value, but you will be able to modify the value through the code. For example:

private void ultraButton1_Click(object sender, EventArgs e)
{
    RadialGauge ss = ultraGauge1.Gauges[0] as RadialGauge;
    ss.Scales[0].Markers[0].Value = (double)ss.Scales[0].Markers[0].Value + 10;
}