Boy your Hdd's internally would have been very hot
I cut a hole under the hdd cage 80mm square and put a 10mm thick fan half in half out the case with no fan at the back.
I put 15mm feet underneath replacing the original ones.
Now the drives come out cold
you can put in a fan controller too which means you can contol how loud it is.
Mike spoke to one of our fellow guys here at CES about dune but at the end of the day suppose there is no after sales service now on dunes...