Alternate to #449

Commenting to Limerick #449 on 12/27, "Boulderite" suggested that line 5 be as follows: 
A Wagnerian opera buff, Cameron,
Caused people to say without stammerin'
(When arias were being sung
In Ring of the Nibelung)
"Götterdämmerun'!  Quit yammerin', Cameron!!"

How's that?  I had to slightly alter lines 2-4, also...