Kit,Conversion,NG (DF,SRT)
  DF      Use Starting With Serial #18180000
          From #17000000 to #18180000 See 813633
          Prior to Serial #17000000 Contact Tech
          Support at 800-222-7820.
  NGDF    See 829536
  SRT     Use Starting With Serial #18180000
          From #17000000 to #18180000 See 813633
          Prior to Serial #17000000 SRT's Are Not
          Convertable.