The SD70M, SD70I, SD75I, SD75M could mean making all new injection molds. It is unfortunate that the K-Line by Lionel SD70MAC/SD75M injection molds did not get to stay with the rest of the LIONEL molds when they were moved out of the Sanda Kan or Kader production line.
I might have to buy a Santa Fe SD75M and a CN SD75I if they actually made them.
Andrew