.........And a word about compressor ratings......... Decades ago, I worked for a parts outfit "and found out" this........
"Real" old school compressors were rated by cfm airflow at 90psi
Then Wards, Sears, I don't know who........found you could advertise flow at 40 psi and make the same compressor "sound bigger."
Then some bright boy found out you can rate them at SUCTION airflow, and make the same compressor sound REALLY large.