I was thinking I needed a way to pivot the eye stalk. I thought that I could get a caster wheel and use that. I am still working on the dome so I do not know if it will fit correctly, but for now this my plan to pivot the eye.
The Blog for Potato Hackers, Diet Hackers, and VegetablePharmers
Arduino and related stuff (including Attiny and ESP8266) and the Raspberry Pi