I'm happy with the defence without Henderson. He should be a break glass case.
As for Selwood, I'd be loathe to play him before Constable and Parfitt and there really isn't a spot unless they decide to play Dangerfield forward and play a defensive mid. Then you still need to drop someone.
Basically see it the same.. I think we have found our best rythum.. of course young players could drop away and if that happens.. break glass.. hopefull by being midful of that .. we have them fit and in form when it counts