If I had to guess they would be refreshed next winter, if the rumored spring deliveries are true Delta is not going to want them sitting out the summer getting refurbished, one might get work done before the summer season starts probably after the last 777 refurb, but while another configuration and them probably not being up to brand standards is going to drive marketing crazy, finance is going to like the idea of parking expensive assets in the busy season even less. Besides they have a Qatar interior right now their not going to be that bad from a paxex point of view.