+
+ delete $pc11_saved{$key}; # because we have promoted it, no longer needed.
+
+ # so unlike the promotion by route, there is a stored, but uncounted PC11
+ # which have discarded. But we have chosed to use better PC61 that's just come in
+ # so we allow the PC61 to be counted later, but count the now discarded PC11
+ # because it *did* come in.
+ ++$pc11_rx;