I just bought a used kenmore 110.66722690 66722 electric dryer. It is missing one of the baffles inside the drum, so there are only 2 baffles instead of 3. The 2 baffles that are in the dryer are not the same size. One is taller than the other. Are all the baffles supposed to be the same? When I look up the part number on sears' website, it gives 2 different model numbers, so I'm not sure which one I should buy to replace the missing 3rd baffle. Does it matter? Should all the baffles be the same, or is it ok to have 2 of one size and 1 of the other? Thanks in advance for your help.