Finally got around to slapping my pressure gauge together for the output side of my big gold hpa filter. I did this for a few reasons 1. I have a check valve between the tank hose and the output side of the filter so when I open my tank valve the pressure stays trapped in the tank hose thus allowing pressure to build between the compressor and filter without all the unnecessary back pressure slamming into the check valve of the compressor which can be harder on your compressor during initial startup, this also allows a dwell time and gives the compressor time to build up pressure in the filter and once the filter pressure equalizes with the tank pressure than the tank slowly starts to fill which is ideal with a Shoebox compressor. I also wanted an extra gauge to rely on. 
