I showed a Photo of a 7955 Pot. If you bend the tag in. It is possible to adjust the center of the servo. Some servos Have the arms badly off center but by backing off the lock screw the Pot can be rotated and that will center the servo arm.
I hope to make a short video showing how to do it. Most likely in the next week or so.
To see all go to my site.
Mrs R.

ALL the best
Rachael
Oh!!!!!!!! I forgot that with the 7950 servo there is a small capacitor coming off the motor terminals. remove it as the 104 Capacitor will sit to high if it is left there.

I Guess I didn't say what the BLOG is about.
A lot of people have had trouble with 79XX HITEC jumping and jittering the information is the mods to stop the servo from doing it.
A by product of the mods is that the servos return to center better and are smoother in use.
It is not a total fix as the problem is the low voltage ground is also the high voltage ground.
All that can be done is filter the noise from entering the low voltage Analog circuit.
Here are more pics with instructions in some.
ALL THE BEST
Rachael

I have started this with just some photos and basic information.
First Solder the thinnest I have is .46mm and it works well unfortunately it is available only in 270 Meter Rolls but if you go to a local computer repair place I'm sure they will sell you a yard and that should do all the servos in a 50 to 170 powered plane.
The next is corrosion it needs to be removed as it can be the cause of many problems including making it hard to solder the parts.
So clean the PCBs before working on them and re-clean them after soldering.
The components are the same for both types accept the motor capacitor the 7955 and others with the same boards need Monolithic 104s and the 7950 uses a Ceramic 104.
Here are a list of parts. and pics of the 7950 mods.
I have more photos of the new parts soldered in place and will be added soon.