Interestingly, the common platform brigade to simplify the supply chain don't seem to understand that if a serious issue develops with the platform [ie. MRH-90 engines] the whole show could be grounded leaving us with nothing. I see that issue arising in the RAAF F-35 only going forward vs. F-35/F-18F [or whatever] mix. With the MRH we could have had no operational ADF utility choppers if the Black Hawk/ Sea King was retired.