Hi Rob,
first of all thank you very much for your interest in our company and
products.
The dent in the middle of the block is wanted, thereby has the cooler a
better performance.
Have a nice day!
Fabian
Mit freundlichen Grüßen / Best Regards
Fabian Noelte
Alphacool International GmbH
Marienberger Str. 1
D-38122 Braunschweig/Germany