Shop air dilemma

My 5HP economy line Devilbliss is now 36 years old. We ran it steady with hopper air loaders at our plastics plant until it seized from being overheated. I brought it home, dumped the oil, refilled the oil, put a big pipe wrench on the pulley nut and rolled it through a couple times, then fired it back up. I've been using it as my shop compressor now for 24 years. I run bleed air in my cabinet to flow dust out and can blast full trigger for hours at a time and the compressor cycles on and off.

Part of THINKING your compressor can't keep up is too small of an air line, which needs to pressurize to give enough flow. A long blast cycle and the flow slows down. Stop, pressurized and go again... I had this issue when I had a 3/8 line from where my compressor is, in the hangar so I don't have to listen to it, to my shop. Replacing that line with 3/4" right to the regulator and filter by my cabinet now has me blasting full blast.