I expect the Yong Heng is likely the most popular smallish Chinese compressor. I got the one that lets you set the shutoff pressure and it has done well for a year and a half now. I have only replaced two o-rings on it thus far. One on the head and the other on the filter. The one on the head was likely due to me not turning on the water pump and overheating it three times. Mine blows the rupture disc to often if I go all the way to 4500psi so I only do 4200psi and then it does fine.
Most will upgrade the filter to a larger one.
Nice little setup you have and thanks for posting. I have been reading some on the Yong Heng with mixed reviews. Have you tried to run coolant instead of water? I would think the coolant would keep temperature contained better than water. Also the fear of contamination using water, probably could use a water softener or conditioner I guess
I have been thinking of running coolant since I got it but never gotaroundtoit. The good thing about these is they are easy to werq on, parts are plentiful and easy to source. Oh, and cheap!