Hi guys, So I experimented last night by taking the screen off the camera in order to expose the sensor a bit better and I got a much much better result. The ambient temperature last night was 46F and the ambient temperature inside the box dropped to 23F and the dark frames were taken at 24F according to the exif file. I have attached two dark frames, one at 70F and one at 24F to see the difference. The camera settings used were 3 minutes at ISO 800. The problem that I encountered is that after connecting the screen back to the camera body, the screen does turn on but the knobs that control the camera settings are not working and also the hot shoe is not working so I cannot frame using the EVF-4. Since I already have the camera opened and most likely I will have to send it in for repair, at this point I am considering attaching a cold finger behind the sensor with a peltier (cold finger) instead of using the cooling and then send it in and hopefully is not too costly. Cheers!