Yea, I guess I am just a dummy but way back in the late 60's I took a what I would call a crash Course at the Carrier facility here in Houston two nights a week for 4 hrs. and it did teach me a lot of the really technical stuff at that time I thought I would never use, hey I was young and knew it all at that age,right? But at the very first class I remember one thing the teacher told us and he put it just like this it's impossible to pull a 30" vacuum and I have always remembered that.
"The critic is a prisoner to his own experiences and perspectives, erroneously believing his limited experiences are the sum of all truth". T.D. Jakes