I know nothing about the QC, but Corison in its late teens is right in the window for my tastes. Sure they’ll age more, and if you like the more mature profile you can certainly hold it longer. But there’s no need to wait.
Suddenly I realized that might be taken wrong, that was not a shot at you Ron (even tho I do that often) it really meant there are no great wine only great bottles. God only knows the condition of any bottles so why take a chance if a wine is already in the drinking window, unless you have many.