Don't forget to check the basics

My Omega Air Charger seems to have slowed when going above 200 bar. Thinking perhaps it needs a rebuild, as it well past 2 years old, I checked my spare parts and starting watching teardown videos. Then I had a thought, I really should check the simple things first. Started looking and found the quick connect fitting on the hose had a small leak when the pressure built up. Put on a new connector... bang back to normal.

Lesson learned, always eliminate the basics first.