I've searched this forum and found some information related to my question, but I'm still experiencing some problems.
The vertical on my pan/tilt camera set-up is having some problems. It still bobs and flops up and down. Sometimes it locks in an up or down position. I don't know if the blue servo just isn't strong enough, or if there's a problem with my set-up.
I replaced the horizontal blue servo with one from the EZ kit, because the first seemed too flimsy. The horizontal tracking for face and color works great.
I uploaded my project file in-case anyone has time to investigate. But it seems fairly simple. I attached a picture of my set-up too. Many thanks!