Hey C sounds like the rad was not quite dead on balls
Hoping it is a simple enough fix
Go to hardware store buy a drill bit just a hair bigger than the holes .... prolly 1/16th bigger
drill through all 12 holes and try again ... that should get you so you can pull it tight
You will need a jig saw to fix the notch
take off end panle and the bottom cut extend 1/4" then on both sides of the notch
that should be just about it .... time to preform repair 15 minutes .....
I knew I should of had you ship me that rad ....
sorry for the screw up bro