Also, as for testing the Incubator. I tested mine with store bought eating eggs in in for a few days, having eggs in there can make a big difference, as they hold heat, and stabilize Humidity in my opinion. As for buying eggs, you may want to run it with your own eggs for a test hatch, otherwise if any problems arise, you could loose the eggs you paid money for. For me I'm impatient, and jumped right in with buying and shipping eggs, and had my bulb blow in the middle of the night, dropping the temp to 80 before I woke up, but they are still developing luckily.
Good Luck!