Vacuum Diagrams

[MOBEONER]

i have been braking my head trying to figure out a better way to relay simplify the vacuum diagram. i personally believe that Mazda`s engineers did a very good job designing the the vacuum system and its very impressive how it works.on the lighter side i also believe that they had a little too much coffee in the process.i was just discussing the importance of the vacuum chambers in the other forums and as of yet i haven't been able to figure out a real reason why from what i can tell the turbo control solenoid valve is that intricate and sensitive that you need two solenoids (h and f) for charge and relieve along with a vacuum chamber box for it to maintain a certain amount of pressure.how many psi does that closed system needs to hold with in that loop for that turbo control solenoid to work? it works only on vacuum i don't see why it was 3 intake connections that can only work on vacuum just to control the lower actuator.