I bought this stove used (w/o) conversion kit or instructions on how to onvert from natural gas to LP. I ordered the conversion kit from Whirlpool, however when it came all of the orifices were the same size. I called an appliance repair guy to come out, he said that the orifices were wrong and he said that he could order them. He ordered them from his warehouse (twice) and both times they sent orifices of all the same size. Is it possible that this model does not have different sized orifices? Everything that I have ever read indicates that there should be two different sizes.