I rebuilt my compressor. One lesson learned, just cut the intake/exhaust lines (the larger black ones toward the back). One decoupled fine, the other had a bad insert and I could not free the line. I mangled it a bit. Not a smart move since its damaged right at the insert. Next time I will just cut the line and have a couple couplers on hand.

So I am looking for a new piece. Used form an old dead compressor it fine. Besides having the line in it, the threads are in horrible shape. It was a real pain to remove and once out I saw why. I assume it happened at assembly. It it were not for the threads, I would just have it drilled out and put an 8mm threaded fitting for the line in there. But at this point...