Here's the last post on this project:
Here's a link to the DIY Page for this project. (Updated with these additions)
Because the servo is fairly heavy, this whole thing just tips over unless it's full of water. I'm also a little worried about how long the water will last in the bottle, probably a while, but, I decided to extend the "pickup tube" through a hole in the side of the bottle. This will allow me to put the other end in a larger reservoir of water. This also allowed me to drill a hole in the bottom of the bottle and screw the whole thing onto a block of wood which will hold everything in place.