.... your one of those guys ...
:jk:
Get some 8 inch party balloons, stretch them a bit to work the rubber so it doesn't tear so easy on you. Pull the servo's out so you can get at them. Stretch the balloon over the servo so that the wire is coming out the mouth of the balloon. Roll back the neck of the balloon a little, put a dab of silicone, roll the neck over the dab, put a couple little zip ties so you create a small bubble of silicone inside the neck of the balloon to make a seal.
Then, take a pin, poke a pin hole over the servo out shaft in the balloon. Stretch the pinhole over the shaft, put on servo horn.
To take up the extra slack in the balloon, I wrap electrical tape all over the thing, kind of like shrink wrap.
Here's a couple pics of balloon'd parts:
Servo in a balloon (not one of my cleaner works of art):
Homeade 5 aa cell nimh pack in a balloon and tape (a little cleaner job than the servo):