I have one of the $25.00 Hobbico IR Thumb sized temp sensor... it reads 125 degrees... but I don't believe it.... I think I can put my fingers on 150 degrees with minimum discomfort... it is hotter than that!

I have adequate exhaust area and I have added exit baffles to inspire the flow out... actually seemed to make no difference...
the batts get just a little warmer than ambient...

4 minutes draws about 1.8 to 2.0 AH of capacity (Based on 3 flights so far)

I don't have any images of the exit.. I try to get those later tonight....

I have a baffle in the Chin Piece that aligns with the aft wall of the baffle around the motor....
the air passes over the motor into the fuse... exits the motor region near the fuse top....
I may add another internal baffle that tkaes that air over the ESC mounted on top just fwd of the Canopy/Hatch