The main combatant jet, along with perhaps one or two other systems, is the most foreign policy/relations dependent of all a country's defense needs. It is not enough just to pay for it, the conditions that come with it have to be compatible with the interests of the country.
So I hope for some progress in the near future in aligning KSA's interests with TR and providing a common perspective. There are no insurmountable points of disagreement between KSA and TR at the moment. As for the UAE, a complex set of problems starting from Syria and even extending to Sudan, Libya and Somalia is an important political barrier. There are still deep divisions in our hinterland and in our shared spheres of influence, some of which are really difficult to manage and therefore have the potential to escalate quickly.