Funny but I've made several of these over the last 5-6 years from IKEA bookstands--both metal and plastic. Started playing with the idea after my kid burned out a pricey Dell laptop. Though it's cooling system was under-spec'd, it's radiator became totally bunged up with dust and lint sucked in by the fan. Easy preventative maintenance is to get at the fan and the air path to make sure it's free from blockage. Still, most laptops are used on surfaces that obstruct or plug the fan intakes on the bottom of most machines. It's a lesson most old hot rodders learned the hard way: big, hi-perf. engines need big hi-perf cooling systems.