Another observation when my evaporator was replaced. King valve at the condenser had no cooling when the filter dryer was brazed in, but he did do a good job of cooling the TXV. Whats the best practice on king valves when brazing - cooling required or not?

I've also since learned that the filter dryer really should have been installed up at the evaporator. Reason for re-installing at the condenser was "because thats where the old one was".