The difficulty with bringing in threequarters in the modern game is that wing isn't the position it used to be, where you could be largely out of the action for long periods. Back then a good way of bringing through a centre or even half-back was to ease them in on the wing, knowing that they wouldn't have too much responsibility to deal with. But now I'm not sure wing is any easier to play than centre. The centre probably has a bit more decision-making responsibility in defence, and perhaps needs a bit more composure with the ball, but wingers in the modern game have a pretty gruelling workload bring the ball out from the 20, and they are much more systematically targeted by attacking kicking games. Unfortunately one thing we don't seem to have is a back-up specialist winger, so we're going to have to improvise one way or another.