I like the heat it up bit but dont try it until you have tried with no heat and dont overdo it, you dont want to damage the piston seals or boil the fluid, also remove some fluid from the reservoir first, to allow for a bit of expansion. Take care not to get brake fluid on to paintwork. Another idea is, if you are going to use an easy out, all well and good, but if youre using a mole grip device, to prevent crushing the hollow nipple push a drill shank of the correct size into the bleed hole before grasping with the grips, this will prevent crushing and mis-shaping the nipple...good luck with it