Corrected entry: When Zach and Gray are waiting in the line for the gyro-sphere, every 20-30 seconds one sphere is leaving. But when they are driving around there is no other gyro-sphere anywhere else around to see. Since these vehicles are not driving that fast, there should at least be some nearby.
Fras Gierscher
21st Jun 2015
Correction: There is one other gyrosphere that can be seen in the distance. On the electronic map in the control room you can also see locations of nearby gyrospheres.