I decided to try these servos over hitec 645 and 5645 to see if I liked them. I have been using these servos in my 20cc p47 for a few years now and have never had an issue. They have been flawless and are high quality. They center very well and provide plenty of torque for warbird flying. These are also installed in top flite giant mustang, and will be in my 60cc Corsair and giant Pitts along with 6180’s. I will also be purchasing 6380’s to see how they are. I am very happy with spektrum servos. I had 3 645 servos fail to center and just kept going back and forth. They all had bad potentiometers and were repaired for free. I am not saying 645 are bad, this is just my experience and why I have decided to change.

These servos work very well and are made very well. I have never had a problem with them. And the box's that they come in can be use to put your extra junk in etc.

I added a 4" arm to see how good this servo centered and I was pleased. Good servo for the money.

I was looking for high voltage servos for a new Helicopter build I was working on. I came across these on the web site and figured they would flt the bill. I was excited to have servos that I could run with a LiFe battery and ditch my voltage regulator. The servos are great and exactly what I wanted.
However, when I was installing them I was using 3mm cap screws with nylon lock nuts. In the process I broke two of the mounting tabs on one servo, kitty corner from each other (totally my fault and NOT the servos). I have emailed and searched and cannot find a replacement case for this servo. I can see replacing a servo due to a crash, but that is not my case.

Now I have an almost new servo that I cannot "safely" mount . I'm just upset that you cannot purchase parts for this servo. I didn't realize that these are a throw away item.