Fittings for the Omega Air Charger 4,500 psi compressor

"bowwild"I just ordered the Omega Turbocharger to fill my Omega 4500 PSI Tank. They told me not to get just the male to male. ($15) Instead I bought two parts they recommended $50 total). Something about not using the line that is on the tank but a stronger one on the compressor?
I use the line that came with the Air Charger (with supplied female foster fitting) and connect to my tank's male foster fitting - no issues.