I had some other trouble today. My compressor completely crapped out.  So, I just had to take it apart. 

Some slight damage to the piston and ring and the cylinder.   

I coulda used the compressed air today too to cut the metal for the door rack. Stupid plasma cutter, now I'm spoiled.  (don't tell my wife, I'll never hear the end of it  )  I resorted to cut off wheels and a sawzall.