Hi, I would like to make a mount for my LCD monitor since there aren't any mounts here. I want the mount to go up and down, left and right, far and close. This one: Amazon.com: VideoSecu Articulating TV Wall Mount Bracket for VESA 100 LCD LED Flat Screen Monitor TV 1E9: Electronics is easy to make, since gravity has nothing to do with it. But if I want to make a similar one that also goes up and down, I won't be able to simply copy the way it moves left and right, because gravity will make the face of the monitor go all the way toward the ground. So, what can I do? How can I make it stop where I want it to stop. I hope what I'm saying is clear, if not I'll try my best to explain. Thank you.