The MV-50 can really use some spit and polish, but at a minimum open up the aircleaner's inlet holes, and get an allen wrench and tighten the 4 head bolts evenly.
If it stops working mysteriously, the wires inside the endcap have pulled from the crimp nuts. Pretty easy fix, but prevention is easier than fixing it when needed, like in 12 inches of snow or when trying to pump your tires back upto 45 PSI for Mex1 driving, from the 32psi that made baja's washboard somewhat tolerable.
The MV-50 is more than 2x as fast as those 12v compressors that come with ciggy plugs, as it can pull 19 amps.