With aging eyes, I found myself way to close for comfort trying to read that small, yong heng, gauge. Time to move it. M10/1.0 threads on the gauge port so I needed an adapter. M10/1.0 male x 1/8th Fpt gets me where I want to be. A decent 2.5” glycerin filled gauge, 2 feet of quality air hose...
www.airgunnation.com