I've used theses kits.
http://www.hansenhobbies.com/product...connectorkits/
Despite the propaganda, it does take a bit of time and dexterity.
The real problem with servo connectors and pins has to do with the small size and
thin metal pins. The female pins can loosen up, and the small contact area does not help.
Then, there is the crimp itself. Even well made and closely inspected crimps can
actually be bad. Nothing is perfect!