Question about an air dryer Harbor freight

I did something similar except I bought a 1/2" copper coil (10')and plumbed it like a still. It does allow the moisture to condense but when the air is moving, like spraying or using high consumption air tools, that will not extract enough moisture at higher cfm/demand. You need a medium to trap the water. Descants are too costly and you can't have enough traps. You need a barrier that stops the moisture. Remember, we are on a small shop level and not an industrial level.