Condor has the habit of switching out the unloader valve with different ones. They change this with just a few pressure switches for certain vendors. Typically we tell people to use the new unloader and simply slide the nylon tube into the new one. I'm sure you have figured this out since when you posted this.

I'm glad that you were able to get your unit back up and running.
Did your old check valve have a metal filter screen in the inlet? If so, remove the filter screen as it tends to get clogged. I'm referring to the tank check valve that goes into the tank.