Well today I tried the higher end BlueBird BMS-50C I'd recommend everyone to stay away. These servos cost me a brand new engine. And a lot of head ach. Long story short the servo over heated and shut down leaving the car wide open. And snapped a rod in brand new engine.
I had time to walk and get the car and temp it after I got back to my pit Sevo temp was 165deg F and locked solid in full thro. I'll keep you guys updated on how the place I bought these from takes care of the issue. They say they stand behind them 100% and have a full year warranty.

Sorry to hear that.
-Futaba Servos are good.

That's why I stay away from cheap after market replacements!

I've bought two of the blubird high torque low profile servos. One was DOA, but the first one I bought I've had in a car for almost 3 years now and has performed flawlessly.

I run them on steering and have never had an issue with 5 of them, knock on wood.
They are 621dmg.
Sorry for your misfortune

It worked fine on steering temp was 120. Throttle was the one giving me issues