Russell D Keymar , MD November 05, 2014 Changed orifices to convert cook top to propane I bought the conversion kit then installed it using the directions provided. I could not remove one of the brass tubes so I ended up gaining access to the orifice by opening the side of the cook-top. Read More... Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes Tools: Screwdrivers, Socket Set, Wrench Set