I have an MDF board (that corky stuff), 80x30" and 6/10" thick. I want to make it a desk, so obviously I'm going to buy some legs from Ikea. The leg is a regular tube, a socket and 5 screws. Is there a way to calculate the safe distance to leave between the legs? I mean I could just buy three legs and put them in a triangle shape but there's no guarantee of the board not breaking on heavier objects.