And Sheister says it's not rocket science.
In 1986 I was loaned to Rocket Research [now aerojet], for the Midget Man missile steering rockets.
I came up with a bone head simple circuit to drive the valve.
The RR chief staff engineer said I had the first new idea in 20 years.
This left me with the impression that rocket science is nothing hard.
Then 30 years later I started watching YouTube videos on missile design, from the V2 through Space X.
Now I think rocket science is hard.