AI Hydra 26 non HD version BLACK with a extra power supply & 2 mounting brackets (1) $175 shipped
I installed a new fan which was ~ $20. When I replaced the fan I could only screw in one side as the other side had a rusted and stripped screw. So the fan isn't seated fully which will sometimes caused some rubbing on the fan guard. So I personally, just removed the fan guard and it works fine. I'm sure you can fix this with replacing the screw/fan -
either way it doesn't effect the unit - it doesn't over heat and it works great.
I installed a new fan which was ~ $20. When I replaced the fan I could only screw in one side as the other side had a rusted and stripped screw. So the fan isn't seated fully which will sometimes caused some rubbing on the fan guard. So I personally, just removed the fan guard and it works fine. I'm sure you can fix this with replacing the screw/fan -
either way it doesn't effect the unit - it doesn't over heat and it works great.