Basic thought:-
Why not put a certain number of JRP-equipped F3s at Al Udeid to do what is shortening the GR4 lifespan? High-fatigue low-houred F3's would surely be better used in that profile, especially with its slightly higher fuel load, than mid-fatigue high-houred GR4s, and would the lack of PW capability really be that much of an issue? Perhaps a small Diamond Fleet of F3's might help the GR4 see out 2020+ in a less expensive way than is coming, i.e another major upgrade?
Thoughts anyone, genuinely interested in a hypothetical discussion.
Jobza