I cooked my SG90 mirror arm servo, and I don't have another one just like it. I set the up position too high, so it was stalled the entire time I was figuring out why I lost half my light ring.
It still works, ironically, but it gets really hot now, and moves really slowly. Like 10 seconds per 1/4 rotation slow.
I have the MG90 knockoffs which jitter terribly, and some HS-53 Hitec ones, without arms long enough.
There is some super glue attempting to make the Hitec ones work. Cross your fingers, and I might actually get a video done.
And I cooked another one. Limits were off by 2.5 degrees. Homing set the servo to 0, which was just outside of the range. Fixed in software now...