Been on the cards for a while. The MH-47Gs, errr, I mean ‘H-47ERs’ will act as pump primers to certify cockpit and avionics architecture and address any lingering airworthiness issues. Then I would imagine the remaining Lot 1 aircraft (including -718j would be replaced by new build (ideally Block II) F models with some UK ASE and comms, and the later attrition buys, Mk5s and Mk6s are new enough to get (another....) cockpit and systems upgrade.