An Idea with overheat issue?

[Endman]

Lately my Spro 3 i5 seem overheat easily and it gets worst in a hot day. After review some pictures from ifixit seem possible to cut a hole in the back of the fan to help with ventilation. Can even attach an 80mm USB fan blow on the cpu fan to increase airflow.

Anyone have any idea what is the best way and tools to cut the hole? Not opening the screen since we all know how fragile the screen are.

 

[Wayne Orwig]

Are you in portrait or landscape when it overheats?
I have only had mine overheat a couple of times. Both of those, I was in portrait mode, and I was inadvertently blocking the vent holes just to the right of where you have the X in that photo.
Have you tried a USB fan in the hot area of the back cover?

 

[Endman]

always in portrait mode, yes nothing is blocking the vent.
I tried those long arm usb fan doesnt help much.
If you search Surface pro 3 in reddit many people has overheat problem.