In need of switch wiring help...

Alright I have a little confusion, and just want to make sure i'm right about this.

8 valves
5 push button switches (front up/down, rear up/down, pancake up only)
5 toggle switch dash panel (front up/down, rear up/down, front corners up/down, pancake up/down)


Basically right now I am drawing a diagram that will let me just follow it instead of guessing at things. I know how to wire the switches and have them work but i'm trying to figure out how to connect both sets of switches safely.

also, what gauge wire would yall reccomend? Is 20 enough?

Run your 9 wire cable from the valves to the cab and feed it from your switch box and dash switches. Run a diode inline on any wire that you don't want to be energized when the when another switch for that valve is used. 20g is fine.