RJ to Waddo vice Greenville
If the jet is ready any company will want to move it off their ramp and deliver to the customer. No liability if a hail storm or tornado does damage. Greenville does not have extra hangar space to store completed aircraft. And, you get credit for an "ahead of schedule" delivery, with possible bonus dollars involved.
Besides, there is a lot more to an operational jet than the flying. Aircraft and backend equipment maintenance folks can work and learn on the real thing at Waddo. You can also run the backend on the ground and do almost complete operational training on the systems.
And, I am sure, all the various offices mentioned in previous posts who must "sign off" on how safe it is want to 'see' the real thing. A trip to Waddington is much cheaper than to Greenville. Even if the steaks are MUCH better in Texas.
Bill