I was gone for 2 weeks, i had a bit of gal sheet for the laptop to sit on, i had the sides bent up 10-15mm so it wouldnt slip off, barely moved with the rubbers under the laptop, plenty of ventilation because it was sitting on a flat surface. Like i said, it was sitting on the back seat the whole trip, it was turned on when I was moving because I was tracking with ozi explorer and saving my tracks daily. Turned off at night, never a problem. Would have done 2000-2500kms of dirt track. Anymore info required just let me know.
Cheers, Azza