Mines down to 116 avg. I've been able to drop the avg temp 11 degrees by lifting the unit 3/4" and adding the usb fan to exhaust from the rear left opening.
Wow, that's great. I tried raising the units by about 1/2 inch and a laptop cooler and it didn't do that much. Installing the dual fans on the left side is really doing a good job. Once the temps stabilize I may remove the forward fan and go with the one on the left rear like you are doing and see what happens.