Beware of youtube videos about connecting 2 compressors together

I plan to run 2 compressors/ tanks. Second one will only kick on at 80 psi. When i blast its usually only for a few minutes.
Longer sessions and i need to keep it from dropping below 80 psi. If you pair both tanks together, the check valves in each one prevent back flow. Be it a load genie or whatever.