Two views of the 10 Meter Stack:
6 element 10 Meter Yagis @ 120', 80', 40' (middle fixed on Europe)
2 element 40 @ 115'
 

The 15 Meter Stack
6 element 15 meter yagis @ 160', 90', 44' (all rotary)
5 element 10 meter @ 170'
 

Top of 15 Meter Stack
5 element 10 meter @ 170', 6 element 15 meter @ 160'
 

 
Two Views of the 20 Meter Stacks
4 element 20 meter yagis @ 180', 110', 65' (middle fixed on Europe)
3 element 40 meter yagi @ 170'
 

Top View of 20 Meter Stack
4 element 20 meter @ 180', 3 element 40 meter @ 170'