Not hard to do, just use a thing called a Guru, it's a controlled fan with a temperature feedback, you plug it into the air intake and set the temperature you desire. One probe on the inside of the egg and one probe in the meat, Set the dome temperature and the desired meat temperature, and the Guru will tell you when done. There are others out there, but this one works really good, some are even controlled from a distance, Ie, a PDA or laptop. you can watch the temp curves and even readjust the settings without even being near the egg or other cooking device.