I am possibly going to buy a classic jenn air range with the four prong cartridges. It has a stainless one and two glass ones with coils. I have seen one on * that is from a cook top that appears to be an exact style and fit to the stove top. The insert image has 5 prongs, and the stove has a female slot that would accept the fifth blade. Will the extra blade cause a feed back or short? Or will one coil be dead? I need to move on the stove and want the stainless inserts, but cannot afford the new oem insert.:o